a) Work out the number of lines of symmetry of shape S and shape T. b) Work out the order of rotational symmetry of shape S and shape T. c) Is it true that the number of lines of symmetry that a shape has is always equal to its order of rotational symmetry? Shape S is a regular 5 point star. Shape T is a square with identical scalene triangle on the top right corner of each side

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For a particular 4x4 linear system of equations, explain Gauss Siedel method.

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calculus what does Differentiate each of the following with respect to x. mean for example 5x^3 e^x

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Chulsoo does 120 jump ropes a day. He jumped rope every day for a week. What is the total number of times he jumped rope during the week?

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经对城乡人口流动情况进行年度调查,发现人口在城乡间有一个稳定的流动趋势:每年农村人口的2.5%迁入城镇,而城镇人口的1%迁入乡村.假如城乡总人口数保持不变,其中60%为城镇人口,并且人口流动的趋势将持续稳定下去.那么,多年以后,城镇人口在城乡总人口中的占比应是多少?

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一家汽车租赁公司在3个相邻的城市A、B、C运营.为方便顾客起见,公司承诺:在某一个城市租赁的汽车可以在三个城市中的任意一个归还.根据经验估计和市场调查,在一个租赁期内,在城市A租赁的汽车在城市A、B、C归还的比例分别为0.6、0.3、0.1;在城市B租赁的汽车在城市A、B、C归还的比例分别为0.2、0.7、0.1;在城市C租赁的汽车在城市A、B、C归还的比例分别为0.1、0.3、0.6.公司开业时,将600辆汽车平均分配给3个城市. 试建立运营过程中汽车的数量在3个城市之间转移的模型,讨论时间充分长时的变化趋势,并分析这一变化趋势是否与600辆汽车的最初分配方案有关.

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下图是一个交通网络图,其中所有道路均为单行道,且路边禁止停车,箭头处的数字为交通高峰期进出主路的车辆数.若在高峰期内,进入每个路口的车辆数等于离开该路口的车辆数,则交通流量平衡,不会发生堵车. 问:各支路的车流量应各为多少,才能达到流量平衡?

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Use the Romberg’s rule to evaluate a definite integral of a chosen function in a given interval by showing the steps and taking n=3.

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三人行,必有我师”。请用概率知识加以解释。

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Найди локальные экстремумы функции z = x*x + y*y + x*y - 4*ln(x) - 10*ln(y)

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Meryem, internette alışveriş yaptığı bir sitenin giriş şif- resini, (A, B, C, D, E, F, 0, 1, 2, 3, 4) kümesinin elemanlarından seçerek oluşturacaktır. • Şifre yedi haneli olup üç harf ve dört rakamdan oluşmuştur. Şifrenin son üç hanesi harftir. Şifrenin bir hanesi aşağıdaki şekilde gösterilmiştir. Kullanıcı Adı Şifre 3. Buna göre, Meryem'in şifresi için kaç farklı du- rum vardır? A) 2400 D) 18750 B) 12500 E) 22500 4. C) 18000

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What is 5 + 5?

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Explain 2 + 2 using boolean logic.

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To calculate the minimum air requirements for a given fuel

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calculate 20 log10 (16/1)

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Процесс выявления геометрических объектов на цифровом изображение можно разделить на два этапа. На первом этапе происходит поиск элементарных объектов (называемых также примитивами) таких как – линия, окружность, эллипс, квадрат, треугольник. На втором этапе происходит попытка объединения выявленных примитивов в сложные геометрические объекты и сравнение полученных результатов с библиотекой шаблонов (последний шаг, в общем говоря, не является обязательным). Но во всех случаях, предыдущая обработка, предназначенная для уменьшения шума характерного для данного вида цифрового изображения, позволяет эффективно применять известные экстракторы контуров для изображений видимой области[22-29]. Под характеризацией на практике понимается процесс идентификации (отождествления) подмножества выявленных примитивов, с учетом их взаимного расположения в пространстве и/или иного образа математического описания, в единый класс объектов. Следовательно, необходимо с начала определить такую характеристическую информацию, которая была бы довольно простой, чтобы облегчить ее использование, но в то же время и эффективной, чтобы ограничить ошибки при идентификации объекта в данном окружении. Чтобы данный объект был распознан, отыскивают его характерные признаки, неизменные при его перемещении, вращении в изображении, а также при изменении масштаба. Это позволяет, наконец, сильно уменьшить размер библиотек, необходимых, чтобы описать совокупность объектов, выбранных для идентификации. Выбор характеристик использования зависит от окружения. Действительно, можно охарактеризовать объект в данном окружении, состоящем из одного или нескольких других определенных объектов. Но, хотя характеризующая модель должна, таким образом, быть адаптирована к конкретной ситуации обработки, существуют и общие широко используемые характеристики. Некоторые специфические характеристики ориентированы, например, на протяженность, форму или на другие отдельные свойства объекта. Другие методы идентификации ведут к более общим способам характеризации образа объекта. Эти методы используют, например, дискретное преобразование Фурье для контура объекта, который можно эффективно описать ограниченным числом составляющих этого преобразования[24].

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найти состояние равновесия и исследовать их устойчивость x’=ay+z y’=-x+y^2 z’=x+y,a>0

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یه مقدمه برای مقاله در مضوع برسی عوامل تاثیرگذار محیطی برخلاقیت ریاضی بنویس

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یه مقدمه طولانی دو صفحه ایی برای مقاله در مضوع برسی عوامل تاثیرگذار محیطی برخلاقیت ریاضی بنویس

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یه تعریف دو صفحه ایی طولانی از اینکه خلاقیت چیه و در ریاضی چه نقشی داره میخوام تویه مقاله بیارمش

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in graph theory, count the numbers of perfect matchings in a complete graph Kn with n vertices

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When you compare these sequences, what patterns or rules can you see ? 1,0,0,0 1,1,1,0,0,0 1,1,1,1,1,1,1,1,1,0 1,0 1,1,0,0,0,0,0

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در مورد روانشناسی خلاقیت در ریاضی یه متن بنویس که طولانی باشه

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1. Уравнение бегущей волны. Относительная деформация 2. Интерференция света. Опыт Юнга 3. Найти величину волнового числа k по известной длине волны λ=10 ^-2 м. Величину π считать равной 3,14.

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یه مقاله 20 صفحه ایی طولانی برام بنویس در رابطه با برسی عوامل تاثیرگذار محیطی بر خلاقیت ریاضی

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1. Свободные механические колебания без затухания. Дифференциальное уравнение, вид решения 2. Законы геометрической оптики. Корпускулярная концепция Ньютона 3. Материальная точка (М.Т.) совершает гармонические колебания так, что ее смещение определяется по закону x(t). Определить скорость М.Т. в момент времени t. x(t)= 5·10 ^-2 cos(6·t+π/6) м , t= π/3 c

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یه مقاله طولانی چند صفه ایی بنویس راجب بررسی عوامل روانشناختی مختلف و تاثیر آنها بر خلاقیت ریاضی، از جمله عوامل مرتبط با شخصیت، هوش، خلاقیت و انگیزه

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برای بررسی عوامل اجتماعی مختلف و تاثیر آنها بر خلاقیت ریاضی، از جمله فرهنگ، اعتقادات، تفکرات و تجربیات مقاله بنویس

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یه مقاله طولانی بنویس راجب بررسی عوامل محیطی مختلف و تاثیر آنها بر خلاقیت ریاضی، از جمله فضای فیزیکی، نور، صدا، رنگ و حرارت

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یه نتیجه گیری طولانی برای مقاله با موضوع برسی عوامل محیطی تاثیرگذار بر خلاقیت ریاضی بنویس

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Find the product of: 9 X 10^-15 and 4 X 10^9

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Find the slope of the line that crosses points (0, -9) and (-3, 4)

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چند مثال تخصصی همراه با توضیح در مورد نقش عوامل محیطی در خلاقیت ریاضی بنویس

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یه مقاله بنویس راجب شیوه آموزش ریاضی و تاثیر آن روی خلاقیت ریاضی

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In February 2010, John tells me "hello, I am 9 years old." If, at some random point in 2023, I meet up with John again, what ages is it possible he could tell me he is (without having lied at any point)?

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roll two dice and the payoff for the roll is the sum of the numbers appearing on the dice. What is the expected value?

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有一个带旋转的矩形,要缩放到能包裹一个不带旋转的同心矩形,应该怎么做

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Найти полный дифференциал функции z=(2x2+3y3)4 Выберите один ответ: a. dz=4(2x2+3y3)5dx+9y2(2x2+3y3)5dy b. dz=16x(2x2+3y3)3dx+36y2(2x2+3y3)3dy c. dz=4(4x)3dx+4(9y2)3dy d. dz=4x(2x2+3y3)3dx+9y2(2x2+3y3)3dy

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Найти частные производные первого порядка функции z=ln(xy4) / Выберите один ответ: a. ∂z∂x=ln1y4 ; ∂z∂y=lnx4y3 b. ∂z∂x=1x ; ∂z∂y=−4y c. ∂z∂x=y4x ; ∂z∂y=4y d. ∂z∂x=y4 ; ∂z∂y=4y3x

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球的表面积公式

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x - (x*69*12)/(36000) = 15045 Test if 15400 is the wright answer

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формула нагрузки на колесо, при известной массе авто и положении центра масс

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勾股定理

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where do you see pi in the next 2 years

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Найди общее решение (x^2+y^2)*y’=2xy

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\int\limits_{\scriptsize 1}^{\scriptsize x^{\frac{1}{3}}}{\frac{1}{1+y^{4}}}{\;\mathrm{d}y}

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每组8个数字,一共有两组。求猜到单组数字的概率和同时猜到两组数字的概率。请列出公式!

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Функциональные преобразования случайных величин. Формула свёртки

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Дано: QI=Q2=4*10 "Кл E=1 Найти: Напряжение между точками Ми N.

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soit la fonction f(x)=x2+log(x) En utilisant les proprietes des fonction continues et derivables, justifier que f est continue et derivable sur ] 0 ; +infinite ]

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what is 2

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将一幅图x方向平移2个像素,y方向平移三个像素,之后顺时针旋转30°,求他的刚性变换矩阵T

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将一幅图x方向平移2个像素,y方向平移三个像素,之后逆时针旋转30°,求他的刚性变换矩阵T

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岭回归本质上是最小二乘估计的改进版

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формула расчета осевых нагрузок грузового автомобиля

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Выпишите уравнение Беллмана для MRP.

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suppose that a certain population obeys the logistic equation: dy/dt=ry(1-y/K) a.) If y0=K/4, find the time at which the initial population has doubled. Find the value of time corresponding to r=0.025 per year.

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\int _0^{2\pi }\int _0^2\:\left(2r^2\cos ^2\left(\theta \right)-2r^2\sin ^2\left(\theta \right)\left(r^2\right)+r^2\sin \left(\theta \right)\cos \left(\theta \right)\left(r^2\right)\right)rdrd\theta

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If we have a variable X that can be predicted using two methods, the first method is using the time series analysis technique to analyze measurements taken for this variable X through time and make a prediction about futuristic measurement. The second method is engaging regression analysis to analyze other variables that have a remarkable effect on our variable X and construct a regression model that can predict variable X. How can we combine these two methods to make a more precise prediction about variable X?!

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Find the value of x.

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A certain ocean wave has a wave length of 20 meters and a frequency of 1.0 hertz. What is the wave’s speed? 4 m/s 20 m/s 2 m/s 40 m/s

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Make a algebraic equation

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теорема гаусса. применение в расчетах

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How much is 5+3

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combien fait en gramme 1% de 17,5 grammes

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calculate this pde equation Partial[u,{x,2}]=Divide[1,α] Partial[u,t],u{x,0,t}=10,u{α,y,t}=10,u{x,y,0}=F{x,y}

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решить Участок электрической цепи состоит из четырех элементов работающих независимо друг от друга и соединенных параллельно. Первый элемент работает безотказно с вероятностью 0,4, второй элемент работает безотказно с вероятностью 0,9, третий элемент работает безотказно с вероятностью 0,2, четвертый элемент работает безотказно с вероятностью 0,2. Найдите вероятность того, что на этом участке цепи тока нет (участок цепи вышел из строя).

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Describe how to calculate barycentric coordinates for a 2D triangle using 3D cross product.

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write me introductory paragraphs for the following three questions: problem 1: Solve the following problem over the interval from t = 0 to 2 using a step size of 0.2 where y(0) = 1. dy dt = (1 + 4t)√y a. Using Euler’s explicit method, b. Using the modified Euler’s method, c. Using the midpoint method, d. Using the classical 4th order Runge-Kutta method, e. Plot all your results on the same graph along with the analytical solution. f. Discuss the accuracy of the four different numerical methods compared to the analytical solution. problem 2: The following is an initial value, second-order differential equation: d2x dt2 + 4x dx dt + (x + 5) sin(ωt) = 0 where dx dt (0) = 2, x(0) = 7, and ω = 1 a. Decompose the equation into two first-order differential equations. b. Solve the system of two first-order differential equations from t = 2 to 8 with a step size of 0.04: i. Using Euler’s explicit method, ii. Using Euler’s modified method, iii. Using Euler’s modified method where the correctors are iterated (either till the relative estimated error is less than 0.001% or up to 15 iterations). c. Plot all results from (b) on the same graph. d. Discuss the differences in the three numerical solutions problem 3: You are given the following system of differential equations: dx1 dt = 1000x1 + 2500x2 dx2 dt = −1500x1 − 3000x2 If x1(0) = x2(0) = 0.5, obtain a solution from t = 0 to 0.3 using a step size of 0.03 with a. The explicit Euler’s method. b. The implicit Euler’s method (note that this problem can be solved via a set of simultaneous linear equations for each time step). c. Plot all results on the same graph. d. Compare the two different numerical solutions in terms of stability an example of what is expected is given as follows. This example is a previous introductory section. This lab focuses on numerical differentiation and integration using various techniques and methodologies. The first problem gives a data set of position with respect to time in order to approximate the velocity and acceleration at various points in time using different differencing formulas. This problem entails plotting the position, velocity and acceleration with respect to time as a way to observe their relationships. The second problem looks to compare forward, central, and backward finite-difference approximations in the context of estimating the first derivative of the given mathematical function. By evaluating the various x values and calculating the corresponding true relative error, the effectiveness of the different finite-difference methods is analyzed. Lastly, a visual comparison of the errors from each method is presented in a single plot versus x. For the final problem, the given formulas for flow rate and concentration are utilized in implementing the Romberg integration technique. Using this method, the mass transported is approximated while maintaining a tolerance of 0.1%. This analysis is conducted for three distinct time spans: from 1 to 4 minutes, from 4 to 8 minutes, and from 1 to 8 minutes.

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The annual rainfall intensities of a city have been recorded for 65 years and the data is as follows: 1085, 1128, 1533, 1173, 1183, 1589, 1244, 1014, 1070, 1099, 1428, 1224, 1232, 1180, 1086, 1616, 1251, 965, 1294, 1096, 1032, 1130, 1036, 1066, 1078, 983, 1326, 1187, 1025, 1436, 1237, 1119, 1340, 1335, 1322, 1291, 1262, 1152, 1117, 1107, 1070, 1131, 1014, 1778, 1423, 1027, 1104, 1096, 1312, 1149, 1204, 1158, 1155, 1471, 1128, 1519, 992, 1269, 1182, 1198, 1228, 1092, 1114, 1036, 1031 (10%) a) Generate a frequency table for the given rainfall intensities (use 9 equal intervals between 900 and 1800). Include only the "Interval" and "Frequency" columns in the frequency table. (10%) b) Using the maximum likelihood method, the parameters for the normal and log-normal distributions are estimated as follows: mean = 1199.3, standard deviation = 168.1 for the normal distribution; lambda = 7.08, and zeta = 0.13 for the log-normal distribution. Test the goodness of fit for both distributions using the Chi-Squared method at 1% and 5% significance levels. (13%) c) Create two separate figures: Figure 1 should display the histogram of the observed rainfall intensities along with the frequency polygon of expected frequencies based on the normal distribution. Figure 2 should display the histogram of the observed rainfall intensities along with the frequency polygon of expected frequencies based on the log-normal distribution. Based on the findings from parts b and c, which distribution will provide more reliable results in probabilistic modeling of the rainfall intensities? Hint: Below given figure is provided as an example. Please use this figure as a reference for generating the plots requested in the question. [Note: The figure mentioned in the hint is not provided in the given context.]

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переформулировать текст: При значениях Bi в диапазоне от 0,25 до 0,5 нагреваемые изделия находятся в переходной области. Приближенные расчеты следует отнести к области «тонких» тел, но точные расчеты требуют применения формул для «массивных» тел.

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Log 10 means

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Can you briefly state the process to have two sample t test

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给出一种关系既是对称的又是反对称的关系

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4. What is the probability of selecting a student who got a score between 43 and 50? The Mean is 58.8 and the Standard Deviation is 20.64

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某RAM芯片的存储容量为2048*8,则该芯片的外部引脚至少为多少条

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if you sprint at 12 mph, how long does it take to spring .25 miles

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For a sequential sequence detector which is designed to detect the bit pattern “10101”, how many states at minimum should we have in its state diagram representation?

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图像傅里叶变换的谱图怎么看

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算术编码的原理和应用距离?

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算术编码的原理和应用举例

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r=8 çemberi ve r=8(1+sinteta) kardioidinin kesişimi olan bölgenin alanı kaçtır?

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If Php 25,000 is deposited now into a savings account that earns 6% per year, what uniform annual amount could be withdrawn at the end of each year for ten years so that nothing would be left in the account after the 10th withdrawal?

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r=3(1+cosθ) kardoid eğrisinin uzunluğu net olarak kaçtır?

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已知频数18,61,24,6,1频度16.4,55.0,21.8,5.8,1.0求他们的频度累计

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Kutupsal denklemi r=2=48rcos(θ)-6rsin(θ)-9 olan eğrinin grafiğini aşağıdakilerden hangisi tanımlar? a) (24,-3) merkezli 24 yarıçaplı çember b)Tepe noktası (48,-6) olan yukarı açık parabol c) (48,-6) merkezli 3 yarıçaplı çember d) Tepe noktası (48,-6) olan sağa açık parabol

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I. ∑(n=1,sonsuz) (-1)^n/9n^1/4+1 serisi için aşağıdakilerden hangisi doğrudur? a) Iraksaktır. b) Mutlak yakınsaktır. c) Şartlı yakınsaktır.

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what is δ(f) the Dirac delta function?

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You have to make full roadmap for a person who has never learned math start frm the Beginer level ro advance level with resources

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If a 4bit ring counter has an initial state 1011, what is the state after the 25 clock pulse

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Consider a system of equation given by [A] {x} ={b} where A=[2 -0.1 -0.2;0.1 7 -0.3;0.3 -0.2 10] and b=[7.85;-19.3;-71.4], and {x}=[x1;x2x3]. Suppose that we use Gauss-Seidel method with zero initial guesses. Which one could be the solution {x} after 3 iterations?

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数学建模是什么

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分数是自然数吗

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自然数和分数

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Расскажи об отделе математического моделирования и перспективных конструкторских решений в СИБНИИЭ

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3x + 41 =119

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如何证明三角形相似

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3x + 36 = 90

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为什么曲面积分的范围是半圆的内测时,高斯公式转化后要加负号

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kutupsal denklemi r=36sinθ olan eğrinin kartezyen denklemi nedir ?

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球棒和球一共11块钱,球棒比球贵10块钱,球多少钱?

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t-test to construct hypothesis

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Zmienna losowa X ma rozkład: P(X=1)=0,3, P(X=2)=0,4, P(X=3)=0,3. Prawdziwa jest zależność

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Consider the primal linear program: max 2x s.t. x ≤ 3 x ≤ 5 x ≥ 0 (a) Write down the equations of primal-dual central path for the problem corresponding to the barrier parameter μ = 1. (You may add slack variables on you own). (b) Consider the primal and dual feasible solutions x = 2 and y = (1, 2). Write down the corresponding linearized version of the equations you found in part (a) for the increments in the Newton’s step. (You may have ∆x, ∆y1, ∆y2...) (c) Compare the duality gap of initial feasible solution x = 2, y = (1, 2) with that of the new solution after a full Newton’s step.

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How and Why would I have used a line of regression to get more precise results

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combien font 1 + 1

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Решить дифференциальное уравнение: x*y*y' = y^2 + x*ln(x)

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Подробно!!! проверить потенциальность плоского поля и вычислить работу силы при перемещении материальной точки единичной массы из точки А в точку В. F(вектор)=(x+y)i(вектор)+(x-y)j(вектор) A(0,1) B(1,0)

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Подробно!!! вычислить криволинейный интеграл 1) по замкнутому контуру в положительном направлении(против часовой стрелки); 2) используя формулу Грина: ∫(от l)xy^(2)dy-x^(2)ydx l: y= x; x = 0; y = 1

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Подробно!!! найти общее решение для ДУ с разделяющимися переменными: y'=ycost

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Подробно!!! решить задачу Коши для линейного уравнения: y'-(y/(t+3))=5+t y(2)=4

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How can I learn the foundations of mathematics?

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Подробно!!! найти частное решение линейного однородного ДУ второго порядка: y''-2y'-3y=0 y(0)=1 y'(0)=-3

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Подробно!!! найти общее решение линейного ДУ второго порядка, используя метод подбора: y''+2y'=2t-1

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Подробно!!! для данных рядов найти а) радиус сходимости и указать область сходимости ряда;б) выписать первые три члена ряда: Σ(от n = 0 до бесконечности) ((x+3)^n/(n+5))

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Подробно!!! Найти первые пять (ненулевых) членов разложения в степенной ряд решения ДУ с заданными начальными условиями y'=x+2y y(0)=1

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Подробно!!! 1) разложить функцию )( xf в ряд Фурье с периодом, равным длине интервала задания функции. 2) Изобразить график суммы ряда )( xS . 3) Спектр амплитуд при помощи диаграмм: f(x)=в системе(если -2<x<=-1, то 0, если -1<x<=2, то 3)

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mozes li ovo rjesiti: Zadana je nelinearna jednadžba x^3 - 2x^2 + x - 3 = 0 a) Pokažite da u intervalu [2, 3] postoji rješenje te jednadžbe. b) Odredite početnu aproksimaciju x0 tako da niz dobiven Newtonovom metodom konvergira rješenju jednadžbe. c) Newtonovom metodom izračunajte aproksimacije x1 i x2

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что означает dx и dy в математике и как это прочитать. Объясни мне подробно

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1. Suppose the demand curve is D(p) = 100 − 2p. What price would the monopolist set if he had 60 apartments? How many would he rent? What price would he set if he had 40 apartments? How many would he rent?

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已知三角形三条边长,求内角

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На березе висело два яблоко, одно упало, сколько яблок осталось на березе?

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鸡兔同笼的问题思路

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鸡兔同笼题目

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ultima cifra de 2^40

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There are 9 birds in the tree, the hunter shoots one, how many birds are left in the tree?

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explain why the possible outcomes for getting a five of a kind with seven dice is 6*5*5*7C5

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Sort these numbers from smallest to largest: 64,7,134.

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In a sorted list of the following numbers from smallest to largest, what is the 4th number in the sorted list: 64,7,134,994,604,777,9,18.

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In a sorted list of the following numbers from smallest to largest, what is the 4th number in the sorted list: 64,7,134,994,604,777,9,18. Give only the 4th number.

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Sort these numbers from smallest to largest: 64,7,134,100034,994,604,777,9,18,30,20.

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In a sorted list of the following numbers from smallest to largest, what is the 4th number in the sorted list: 64,7,134,994,604,777,9,18. Give only the 4th number, not the entire sorted list.

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In a sorted list of the following numbers from smallest to largest, what is the 5th number in the sorted list: 64,7,134,994,604,777,9,18. Give only the 5th number, not the entire sorted list.

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Sort these numbers from smallest to largest: 64,5,134,100074334,96,604,777,9,18,219,20.

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Sort these numbers from smallest to largest: 64,0005,134,100074334,96,604,777,9,18,219,20.

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What is the expected value of getting 1 or 2 6s when rolling 3 dice

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What is the probability of rolling exactly 1 or 2 6s with 3 dice. Some say 75/216 others say 90/216

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Calculate the following sums, and then sort the sums from smallest to largest: 64+5,9+8,13+8.

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Calculate the following sums, and then sort the sums from smallest to largest: 64+5,9+8,13+8. Don't show the sums or any calculations.

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Calculate the following sums, and then sort the sums from smallest to largest: 64+5,9+8,13+8,2+3,13+14. Don't show the sums or any calculations.

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Calculate the following sums, and then sort the sums from smallest to largest: 64+5,9+8,13+8,2+3,13+14. Don't show the sums or any calculations. Instead, use the expressions already listed.

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if you lose on a 50/50 bet, what percentage of the original bet should you bet the next time?

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What is considered to be a "small sample," and why is this concept a concern to statisticians? To what extent do market researchers concern themselves with small samples? Why?

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Calculate the following sums, and then sort the sums from smallest to largest: 113+19,64+97,9+8,1+3,2+3,13+14,93+19,82+10. Don't show the sums or any calculations. Instead, use the expressions already listed.

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Are the following two sample results significantly different? Sample 1 Mean: 10.6 Std. dev:1.5 n = 150 Sample 2 Mean: 11.7 Std. dev: 2.5 n = 300 Confidence Level 95% Your Finding? Sample 1 Percent: 45% n = 350 Sample 2 Percent: 54% n = 250 Confidence Level 99% Your Finding? Percentages are involved, so the difference between percentages formula must be used. Sample1 Mean: 1500 Std. dev: 550 n = 1200 Sample2 Mean: 1250 Std. dev: 500 n= 500 Confidence Level 95% Your Finding?

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Sort the following numbers from smallest to largest: 912,0,873,200,199,43,3434,12,993,11,4.

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已知 a + b + 2ab = 14, 其中 a,b为整数,求a + b

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在20cm的力臂一端使用10kg压力,力臂另一端的扭力是多少

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Вычислить интеграл ∫dxsin2(3x+5)

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Magnitude a cross b equals 108

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Функция плотности непрерывной случайной величины Х задана в виде: f(x) = 0 при x <= 1; f(x) = cx^2 при 1< x <= 3; f(x) = 0 при x>= 3. Найти значение параметра с, записать уравнения функции плотности и функции распределения. Найти M(X), D(X), G(X), P(X > M(X)), медиану. Построить графики функции плотности и функции распределения.

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حدثني قليلاً عن متسلسله فورييه

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The Bagel Boy bakes 80 dozen bagels at a cost of $2.35 per dozen. If a markup of 50, on selling price is needed and 10%, of the bagels remain unsold and will be donated to a shelter, find the selling price per dozen bagels. (5 Puan) $4.70 $5.08 $4.82 $5.22 $4.94

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一个等腰三角形,已知一个角是70°,另外两个角的度数各是多少?

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If I have 2, I take one away but add 5, how much is it?

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如果起始人口为2000万,平均寿命为33岁,平均生育年龄为16岁,151年人口达到4亿,请问这151年的平均总和生育率是多少?

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can you generate a word problem on Pythagoras theorem finding one side of a right angle triangle. : This is an example of such a question: Make sure to solve the question correctly. A fisherman is fishing at the edge of a 40-foot-wide river. He is across from his friend Bob, who is fishing at the edge of the other side. Bob’s friend Arthur is fishing 30 feet down the river from Bam. How far is Irene??? from Arthur?

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What is a Sobolev space and Sobolev norm 1 and 2 etc.? Where is it used to? In Quantum Chemistry for description of many body systems we usually use approximate wave functions and we require that this wave function has to be extended in a complete basis set. And the completness in this case means completness in euclidien norm. Why we need completness by Sobolev norm? Is it connected somehow with differential nature of kinetic energy operator? Elaborate in details.

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1949年有5.4亿人口,如果每年增加1.8%人口,到2023年有多少人口

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1-31/50 est egale a combien et comment ?

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почему его можно сократить до нуля?? -cos(pin(-1)/2)

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Почему -cos((pi*n*(-1))/2) всегда равно 0

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what is the local maximum of y=(7-x)^2*e^(x/3)-10

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Use the secant method with x0 = 1 and x1 = 2 to solve x^3 – x^2 − 1 = 0 to within 10^−4

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بماذا يذكرك هذا الرقم 2520

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graph this: Table 2 Content: Sufficiency of Information ___________________________________________________________________ Mean 75.000 Standard Deviation 35.355 Skewness 01.414 Kurtosis 01.500 ___________________________________________________________________

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make me a math class meme my teachers are ms stewert and balkin

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There are two in front of a swan, two swans behind a swan and a swan in the middle. How many swans are there? Think out loud.

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Kolmogorov-Smirnov检验是什么,什么情况适用

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狗跑5步的时间马跑3步,马跑4步的距离狗跑7步,现在狗已跑出30米,马开始追它,问狗再跑多远,马可以追上它?

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For a given tangent t to a curve C, What is the offset of the tangent x, at distance z from the tangents divergence, (The curve is of constant RADIUS r)

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Ao disputar um torneio de tiro ao alvo, o Jo ̃ao tem de atirar sobre o alvo quatro vezes. Sabe-se que, em cada tiro, a probabilidade de o João acertar no alvo é 0,8. Qual é a probabilidade de o João acertar sempre no alvo, nas quatro vezes em que tem de atirar?

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\int _0^{2\pi }\int _0^2\:\left(e^{r\cos \left(\theta \right)}-r\cos \left(\theta \right)\cdot \:e^{r\sin \left(\theta \right)}\right)rdrd\theta

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In a mathematical paper about NLP and authorship attribution, please explain how the 320,000,000 figure is reached in the following (as simply as you can): "Recording the distances between each pair of 18,000 tokens would generate around 320 million data points"

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a+c=0 -2a+b=3 -2b+c=0 реши удобным способом

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Simplify tan100∘+4sin100∘.\tan 100^\circ + 4 \sin 100^\circ.tan100∘+4sin100∘. Think out loud.

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如果已知一个任意多边形的周长,是否就可以知道这个多边形的面积?

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Даны действительные числа a, b, c, d. Выяснить, можно ли прямоугольник со сторонами a, b уместить внутри прямоугольника со сторонами c, d так, чтобы каждая из сторон одного прямоугольника была параллельна или перпендикулярна каждой стороне второго прямоугольника.

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what year was a house built if its 237 years old (its 2023)

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The R-squared of 0.81 for a simple linear regression means... None of the interpretations here is correct. Changing the independent variable will lead to a substantial change of the dependent variable. 81% of the predictions of this regression would be correct. The two variables have a strong positive relationship with r = 0.90.

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Give me the title and the outline of a book that talks about the importance of the number 5.

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Hvor mange watt går der på 1 hestekraft?

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hvor mange prosents forskjell er det på 159,48milliarder til 159,7milliarder

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what is the middle 50% of data for a dataset with a median of 500 and a quartile deviation of 25?

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How did we discover pi? How did we figure out that its value 3.14?

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5 people were eating bananas, A finished before B, but behind C. D finished before E, but behind B. What was the finishing order of all 5 people? Think out loud.

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If 5 clothes take 5 hours to dry on a clothesline outside, how long would 30 clothes take to dry on the same clothesline? Think out loud.

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Se llama estrategia óptima a la que: A. Implica el mejor resultado garantizado para max. B. Implica el mejor resultado garantizado para min. C. Implica que tanto max como min obtengan el mejor resultado garantizado.

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A man has 48 socks in his drawer: 19 blue socks, 15 black socks and 14 red socks. The lights are out and it is completely dark in the room. How many socks must he take out of the drawer to be certain that he took out at least 2 black socks? Think out loud.

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The toroid consists of N turns and has a rectangular cross section. Its inner and outer radii are a and b, respectively. What is the inductance of the toroid?

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Allen, Brook, Chris and Dusty want to cross a river in a boat that can a maximum of 100 pounds. Allen weighs 90 pounds, Brook weighs 80 pounds, Chris weighs 60 pounds and Dusty weighs 40 pounds, and they have 20 pounds of supplies. How do they get across? Think out loud.

Math


什么叫离散化处理

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Allen, Brook, Chris and Dusty want to cross a river in a boat that can carry a maximum of 100 pounds. Allen weighs 90 pounds, Brook weighs 80 pounds, Chris weighs 60 pounds and Dusty weighs 40 pounds, and they have 20 pounds of supplies. The supplies cannot be divided. How do they all get across, including the supplies? Think out loud.

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Susan and Lisa decided to play tennis against each other. They bet $1 on each game they played. Susan won three bets and Lisa won $5. How many games did they play? Think out loud.

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Реши лиф уравнение y”+3y’=(x-2)e^-3x

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given y(x)=B*cosh(ax)-(e/a)*sinh(ax), where e,a>0 how do you determine an expression for e, in terms of B and a that gives a bounded solution as x tends to infinity

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is study of mathematics is harmful

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is it dangerous to the harmful people by having no mathematical understanding

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in graph theory, what is the chromatic polynomial of a cycle of Cn and prove it.

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Calcolare la probabilità che, effettuando 4 estrazioni con reimbussolamento da un'urna contenente 20 palline bianche e 30 nere, vengano estratte per tre volte una pallina bianca le risposte sono 0.461, 0.761, 0.971, 0.154

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En una pirámide de altura 4 decímetros, con una base cuadrada de perímetro 24cm, calcula el área lateral

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Реши методом приводящиеся к однородному Ду: y`sqrt(x+y+1)=x+y-1

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Can you tell me what 45x68-99+6%7+88+99x99=

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Игральный кубик бросают дважды. Известно, что во второй раз выпало больше чем 3. Найдите вероятность того, что в сумме выпадет 8.

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事件AB至少有一个不发生怎么表示

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Veuillez calculer une facture avec les éléments de Votre Nom, Post Nom et Prénom ( le Nom représente la Quantité, le Post-Nom et Prénom représente le cout Unitaire, la TVA 16 %. Net à payer c’est combien ?

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中国那些型号的袖珍计算尺有重对数尺

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一个常值函数可以复合其它的非常值函数吗

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Is it possible to calculate the ellipticity of a galaxy from its inertia tensor?

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Is it possible to calculate the ellipticity of a galaxy from its moments of inertia?

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whats 1 +1

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Determinare la probabilità che estraendo per 5 volte una carta da un mazzo da 40 (con reimmissione e rimescolamento) si ottengono esattamente 3 figure

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give me 10 names for math YouTube channel

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Brian and Stan decided to play tennis against each other. They bet $1 on each game they played. Brian won three bets and Stan won $5. How many games did they play?

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Brian and Stan decided to play tennis against each other. They bet $1 on each game they played. Brian won three bets and Stan won $5. How many games did they play? Think out loud.

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Brian and Stan decided to play tennis against each other. They bet $1 on each game they played. Brian won three bets and Stan won $5. How many games did they play? Let's think step by step.

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You are Paul Erdős. Solve the following question: Question: Brian and Stan decided to play tennis against each other. They bet $1 on each game they played. Brian won three bets and Stan won $5. How many games did they play?

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Topf-Auswahl für Mammutbaum User Nachdem Ich endlich ein Grundstück für den Schulgarten gefunden haben, soll ein Mammutbaum das Herzstück dieses Gartens werden. Zunächst muss dieser aber noch etwas im Topf ‚aufgepebbelt‘ werden. Leider ist sein Topf zu klein geworden. Besonders die Höhe ist zu niedrig, das Volumen und der Durchmesser zu klein. Im Keller der BBS EHS haben wir noch drei Töpfe zur Auswahl. Entscheide mit Hilfe des Rotationsvolumens in welchen Topf wir den Mammutbaum pflanzen sollen. Eigenschaften Aktueller Topf: Durchmesser (Oben) 13.8 Cm, Höhe 12cm, Bewuchs: Wurzeln füllen den Topf aus. Kriterien für den neuen Topf: 2-3cm größer und möglichst hoch. Es gibt 3 Töpfe zur Auswahl mit einer jeweiligen Funktion. Deine Aufgabe ist die Auswahl des richtigen Topfes. 1. Skizziere zunächst die Funktion 2. Berechne den Durchmesser des Topfes am oberen Topfrand 3. Berechne das Volumen des Topfes mithilfe des Rotationsvolumens. Bestimme die Integralgrenzen mithilfe deiner Skizze. Hinweis: Ignoriere zur Einfachheit die Wandstärke des Topfes, schau dir nur den Durchmesser des Topfes am oberen Topfrand an. Folgende Töpfe sind zur Auswahl: 1. Der Kunststofftopf: Dieser Topf besteht zu 100% aus recycelten Kunststoff und ist äußerst langlebig. Er hat eine Höhe von 16cm. Halbieren wir den Topf und sehen ihn uns von der Seite aus an wird er durch folgende Funktion oberhalb der x-Achse beschrieben: f(x)= √x+4 Auswahl 2: Der Keramiktopf: Der Topf besteht aus haltbarer Keramik und ist Made in Germany. Seine höhe beträgt 14.3 cm. Beschrieben wird er näherungsweise durch die Funktion g(x)= -11/500*x^2+21/50*x+7 Auswahl 3: Der Seltsame: Dieser Topf besticht durch sein außergewöhnliches Design. seine Höhe beträgt 11cm. Beschrieben wird er näherungsweise durch die Funktion h(x)= 0.001*x^4-0.036*x^3+0.19*x^2-0.071*x+17.33

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Math


You are Terence Tao. Solve the following question: Question: Brian and Stan decided to play tennis against each other. They bet $1 on each game they played. Brian won three bets and Stan won $5. How many games did they play?

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58 × 3√(9)

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258 × 6 =

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you're a professional math tutor. You're going to generate 10 multi-choice practice questions on the topic " Area and circumference of a circle" The questions will include ccases where radius and diameter are given . the questions should be simple enough for an 8 years old to solve. Include solutions and the correct answer. the solutions should also be simple to assimilate Make sure your calculation is correct. Don't make any mistake

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There is a guy named Jones how many to paid his rent of $69.44 and then a rent guy must pay him $75, How much money that he paid by the rent guy?

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Gib mir den genauen Rechenweg an, der mir die Informationen liefert die Ich brauche um die folgenden 3 Funktionen zu skizzieren. Funktion 1: f(x)=√x+4 Funktion 2: g(x)=-11/500*x^2+21/50*x+7 Funktion 3: h(x)=0.001*x^4-0.036*x^3+0.19*x^2-0.071*x+17.33

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you're a professional math tutor. You're going to generate 10 multi-choice practice questions on the topic "Finding the area and unknown side of a parallelogram" The questions should be easy enough for an 8-year-old to solve. Include solutions that are easy to understand and the correct answer on a list from 1 - 10. your answer should have the correct option, then the answer the option holds. Make sure your calculation is correct. Don't make any mistakes.

Math


A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out?

Math


A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out? Let's think step by step.

Math


A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out? Think out loud.

Math


You are Terence Tao. Solve the following problem: A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out?

Math


A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out? Use a scratchpad to help you reason.

Math


A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out? Use a scratchpad to help you reason, listing how many socks of each color are still in the drawer after each sock is taken out.

Math


أصعب دالة رياضية

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A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out? Use Kahneman's system 2 thinking style.

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A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out? Think "out of the box".

Math


A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out? Use common sense.

Math


A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out? Mentally visualize the problem.

Math


A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took at least 2 black socks out of the drawer?

Math


A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took at least 2 black socks out of the drawer? Think out loud.

Math


A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took at least 2 black socks out of the drawer? Reformulate the problem to a simpler toy problem first.

Math


A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took at least 2 black socks out of the drawer? Reformulate the problem to a similar one in your training dataset first.

Math


A random sample of 200 was selected to estimate the average amount of time retired folks in Arizona listened to the radio during the day. The sample mean was 110 minutes, and the standard deviation was 30 minutes. The 95% confidence limits for the population mean listening time are

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why does finding the probability of dice use combinations but the probability of a slot machine does not?

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A slot machine with 3 slots has has 7 pictures on each slot: 1 bell and 6 fruits. 3 bells in a row wins $50, 3 of the same fruit in a row wins $10, and 2 bells and 1 fruits in a row wins $2. What is the shortest way by hand to find the EV?

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With a $3000 bet, if you roll at least one 6 but no 1s you get $10,000, otherwise you get $0. You get to choose how many dice to roll at one time. Make a table showing the EV for the number of dice in a single roll from 1 to 10.

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A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out? Solve using a recursive and backtracking technique.

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设任意两个事件A,B,P(4)=0.8,P(A-B)=0.6,则 P(AUB)=

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A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out? Solve using by breaking problems into subproblems and solving them recursively.

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A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out? Answer as a master logician would answer.

Math


A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out? Do some probing of the problem space before answering the question.

Math


Since your math answers are always wrong, are there any chatbots that are good at math?

Math


A man has 46 socks in his drawer: 18 blue socks, 14 black socks, and 14 red socks. The lights are out and the man is completely in the dark at night. How many socks must he take out to make 100 percent certain that he took 2 black socks out? Ponder the question out loud for awhile before answering.

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What is the probability of getting at least one or two 6s in a single roll with three dice? Solve this problem as if you were Chat GPT 2, Chat GPT 3, and Chat GPT 4.

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My friend John is 60 years old. Last year his height was 180 cm. Then, he has gained 20 cm. How tall is he now? Think out loud.

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Как исследовать функцию на дифференцируемость в конкретной точке

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Исследуй на дифференцируемость функцию u = |y|*sinx в точке O с координатами (0, 0)

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Можешь привести пример исследования функции на дифференцируемость в точке, подробно описывая каждый шаг?

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Можешь привести пример исследования функции 2 переменных на дифференцируемость в точке, подробно описывая каждый шаг?

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There are 5 boxes in a row numbered 1 to 5, in one of which a dog is hiding. Every night it jumps to an adjacent box. Every morning you can open 1 box to try to see if the dog is in it. What should your strategy to find the dog be? Let's think step by step.

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There are 5 boxes in a row numbered 1 to 5, in one of which a dog is hiding. Every night it jumps to an adjacent box. Every morning you can open 1 box to try to see if the dog is in it. What should your strategy to find the dog be? Think out loud.

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There are 5 boxes in a row numbered 1 to 5, in one of which a dog is hiding. Every night it jumps to an adjacent box. Every morning you can open 1 box to try to see if the dog is in it. What should your strategy to find the dog be?

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你好,ChatGPT。请问如何证明 2+2=2*2 ?

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Исследуй функцию u = |y|*cosx на дифференцируемость в точке O(0, 0)

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Исследуй функцию u = |y|*sinx на дифференцируемость в точке O(0, 0)

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A man has 36 socks in his drawer: 10 blue socks, 12 black socks, and 14 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he took at least 2 black socks out? Think out loud.

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булевая функция f представлена таблицей истинности: A(0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1) B(0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1) C(0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1) D(0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1) f(0 0 0 0 1 1 1 1 0 0 0 0 0 1 0 1) Какая переменная является несущественной?

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Объясни простыми словами, что такое отношение эквивалетности, приведи примеры и объясни, почему они являются такими

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Какой вид имеет интегральная оценка, которая характеризует меру близости переходного процесса к «наилучшему»?

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Berechne den oberen durchmesser der funktion f(x)=√x + 4

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计算器怎么计算8是2的几次幂

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Write a creative and attractive math lesson plan to teach the subject of numbers and pairs to elementary school children, which also has the following topics. 1- General purpose 2- Partial 3- Behaviour 4- Teaching methods and class model 5- Educational materials and media 6- Creation and motivation 7- Input evaluation 8- Lesson presentation (including teacher and student activities) 9- Formative and final evaluation 10- Presentation of homework

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Составь уравнение касательной к плоскости x*y^3 + z^3 = 16 в точке (1, 2, 2)

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тrapezoidal公式余数公式

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Her biri 40 megabaytlık 75000 fotoğraf kaç GB eder?

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continue e ssa informação "Cálcis da Celessíria era uma cidade conhecida por ser um centro comercial e cultural. Ela ostentava uma escola siríaca que possuía importantes avanços na matemática, teria sido nessa cidade que nasceu Diófanto de Cálcis, o famoso matemático autor de uma importante obra sobre equações. A escola também possuía um grande..."

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Using IEEE double presicion, what is the largest integer we can use without precision loss

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If you have a win rate of 60 percent, on average how many times would you expect to win twice in a row over 100 games

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5 The line L has equation 3y - 4x = 21 The point P has coordinates (15, 2) 5 (a) Find the equation of the line perpendicular to L which passes through P. [2 marks] 5 (b) Hence, find the shortest distance from P to L. [4 marks]

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How soon will I make 703 sextillion if I produce 134 quadrillion a second

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generate 4 columns with sum of 300, divide them randomly into odd numbers

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Which is the lowest time complexity sort

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soit le susteme linear s mx+2y+3z=3 (m-1)x+my+z=1 (m+1)x+my+(m-1)z=m-1 donner l ecriture matricielle ,caluler le detreminant sresoudre le systeme par gausse

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what's the opposite of infinity?

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What is the value of pi

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Prove for every prime p the sqrt p is irrational

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Y rasgele değişkeniyle ilgili f(y) = { cy2 , 0 < y < 1 c(2 − y) , 1 < y < 2 fonksiyonunun, olasılık yoğunluk fonksiyonu olabilmesi için c sabitinin değerini bulunuz.

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X1,X2, ... , Xn Bernoulli (0.5) dağılımından 10 birimlik rassal bir örneklem olsun. H0: θ = 0.3 H1: θ = 0.4 a) α = 0.10 anlamlılık düzeyinde yukarıdaki hipotez testi için düzgün en güçlü test fonksiyonunu bulunuz. b) Testin gücünü hesaplayınız. Bunları sınav kağıdına yazacağım en alta adım adım işlemleride eklersen sevinirim

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Varyansı 8 olan normal bir yığından alınan 30 gözlemlik rastgele bir örneklemin örnek varyansı S^2 nin 12,61 den küçük olma olasılığı nedir? 0,99 0,85 0,975 0,95 0,90

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Proof that any square root of a prime number is irrational, in plain ASCII for a very old printer to print on paper

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Soit la fonction définie par : f(x) = x 3 sin 1 x 1. Quel est l’ensemble de définition de f ? 2. La fonction f est-elle paire ou impaire ? 3. Calculer la limite de f en +∞. 4. Montrer que lim x−→0 f(x) = 0.

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A department store has determined that 25% of their sales are credit from a random sample of 60 sales. Find a 95% confidence interval for the population proportion.

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A man has 42 socks in his drawer: 12 blue socks, 14 black socks, and 16 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he took at least 2 black socks out of the drawer? Let's first prepare relevant information and make a plan. Then, let's answer the question step by step (pay attention to commonsense and logical coherence).

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A man has 42 socks in his drawer: 12 blue socks, 14 black socks, and 16 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he took at least 2 black socks out of the drawer? Think out loud and consider multiple perspectives.

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A man has 42 socks in his drawer: 12 blue socks, 14 black socks, and 16 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he took at least 2 black socks out of the drawer? Let's devise a plan and solve the problem step by step.

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Fred and Lin decided to play basketball against each other. They bet $1 on each game they played. Fred won 3 bets and Lin won $5. How many games did they play? Let's first prepare relevant information and make a plan. Then, let's answer the question step by step (pay attention to commonsense and logical coherence).

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Fred and Lin decided to play basketball against each other. They bet $1 on each game they played. Fred won 3 bets and Lin won $5. How many games did they play? Let's first prepare relevant information and make a plan. Then, let's answer the question by thinking out loud (pay attention to commonsense and logical coherence).

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A man has 42 socks in his drawer: 12 blue socks, 14 black socks, and 16 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he took at least 2 black socks out of the drawer? Let's first prepare relevant information and make a plan. Then, let's answer the question by thinking out loud (pay attention to commonsense and logical coherence).

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Fred and Lin decided to play basketball against each other. They bet $1 on each game they played. Fred won 3 bets and Lin won a net of $5. How many games did they play? Let's first prepare relevant information and make a plan. Then, let's answer the question step by step (pay attention to commonsense and logical coherence).

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Residuos, Teorema del residuo, Evaluación de integrales. Resumen

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resuelveme el siguiente problema matematico: si 200mg esta dentro de 1 ml ¿dentro de cuantos mililitros se haya 100 mg?

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Bill and Lynn decided to bowl against each other. They bet $1 on each game they played. Bill won 3 bets and Lynn won a net of $5. How many games total did they play? Here is how you must answer the question: First, list relevant information. Second, make 2 different plans for how to answer the question. Third, decide which plan is best. Fourth, using the best plan, answer the question step by step, paying attention to common sense and logical coherence. Fifth, try to find problems with your answer, but don't give a new answer.

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give me the answer to this riddle: Within a circle with area 2888π, a square ABCD is inscribed such that the corners of the square touch the circumference of the circle. Point E is on AD and point F is on BC such that EF divides the square ABCD. The ratio of area ABFE and area CDEF is 6:13 a) Find the minimum possible length of EF2 b) Find the maximum possible length of EF2 Format: a,b e.g. 10,11

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A man has 48 socks in his drawer: 12 blue socks, 16 black socks, and 20 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he has taken at least 2 black socks out of the drawer? Here is how you must answer the question: First, list relevant information. Second, make a plan for how to answer the question. Third, using the plan, answer the question, paying attention to common sense and logical coherence. Fourth, examine your answer and list any problems found, but don't give an improved answer.

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A man has 48 socks in his drawer: 12 blue socks, 16 black socks, and 20 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he has taken at least 2 black socks out of the drawer? Here is how you must answer the question: First, list relevant information. Second, make a plan for how to answer the question. Third, using the plan, answer the question, paying attention to common sense and logical coherence. Fourth, critique your answer and list any problems found, but don't give an improved answer.

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A man has 48 socks in his drawer: 12 blue socks, 16 black socks, and 20 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he has taken at least 2 black socks out of the drawer? Here is how you must answer the question: First, list relevant information. Second, make a plan for how to answer the question. Third, analyze the plan for problems, and refine the plan if necessary. Fourth, using the refined plan, answer the question, paying attention to common sense and logical coherence.

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A man has 48 socks in his drawer: 12 blue socks, 16 black socks, and 20 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he has taken at least 2 black socks out of the drawer? Here is how you must answer the question: First, list relevant information. Second, make a plan for how to answer the question. Third, analyze the plan for problems, and refine the plan if necessary. Fourth, using the refined plan, answer the question by thinking out loud, paying attention to common sense and logical coherence.

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A man has 48 socks in his drawer: 12 blue socks, 16 black socks, and 20 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he has taken at least 2 black socks out of the drawer? Here is how you must answer the question: First, list relevant information. Second, make a plan for how to answer the question by thinking out loud, paying attention to common sense and logical coherence. Third, analyze the plan for problems, and refine the plan if necessary. Fourth, using the refined plan, answer the question by thinking out loud, paying attention to common sense and logical coherence.

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A man has 48 socks in his drawer: 12 blue socks, 16 black socks, and 20 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he has taken at least 2 black socks out of the drawer? Here is how you must answer the question: First, list relevant information. Second, get a plan from Albert Einstein for how to answer the question. Third, get a plan from Terence Tao for how to answer the question. Fourth, decide which plan is best. Fifth, using the best plan, answer the question, paying attention to common sense and logical coherence.

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A man has 48 socks in his drawer: 12 blue socks, 16 black socks, and 20 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he has taken at least 2 black socks out of the drawer? Here is how you must answer the question: First, list relevant information. Second, make a plan for how to answer the question. Third, divide any complex parts of the plan into substeps. Fourth, using the revised plan, answer the question, paying attention to common sense and logical coherence.

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A man has 48 socks in his drawer: 12 blue socks, 16 black socks, and 20 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he has taken at least 2 black socks out of the drawer? Here is how you must answer the question: First, list relevant information. Second, make a plan for how to answer the question, including a visual diagram. Third, divide any complex parts of the plan into substeps. Fourth, using the revised plan, answer the question, paying attention to common sense and logical coherence.

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A man has 48 socks in his drawer: 12 blue socks, 16 black socks, and 20 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he has taken at least 2 black socks out of the drawer? Here is how you must answer the question: First, list relevant information. Second, make a plan for how to answer the question. Third, divide any complex parts of the plan into substeps. Fourth, using the revised plan, answer the question by thinking logically out loud, paying attention to common sense and logical coherence.

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Differentiate the following with respect to x y= loge 8x

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Explain why the amount of ways to roll one number 6 and no 1s is 2C1 * 4.

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Explain why the amount of ways to roll one number 6 and no 1s with two dice is 2C1 * 4.

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形心坐标公式

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is the number of face cards in a 53 card deck 3^3?

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Hello, Could you please explain with differentiation ((1-x)+(1+x))/((1+x)(1-x)) equals 2/(1-x^2)

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how do you right an equation where you want to multiply everything by 2 times itself such as 2 is 4, 10 is 20, etc.

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向量组线性相关,且秩为S,则( )

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含有零向量的向量组必线性相关.

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I have a deck of cards. The deck has 11 cards. The cards have point values as follows: 0,5,5,10,10,20,20,20,30,30,40. If I draw 3 cards at the same time, what is the probability that they sum to 20 or higher? if you understand let's understand your anwser in easy way step by step.

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两个幂级数在它们的收敛区间的公共部分内不能进行逐项相加、相减。

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设随机变量X~B(4,0.2), 则P{X>3}=( )

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how to calculate the entropy for numerical variables in decision tree

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Halo gimana cara menyelesaikan rumus 1+1

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В треугольнике ABC угол C равен 90°, синус A = дробь: числитель: 7, знаменатель: 25 конец дроби . Найдите косинус A. Реши задачу с доказательством

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一个一点序列的DFT就是它本身吗

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Een visser merkt golven op het water. Op het water drijft een dobber. Die dobber bereikt elke 2,5s een top (zodat de dobber dan het verst uit het water komt). De afstand tussen twee golftoppen bedraagt 6,5m. Bepaal de golfsnelheid.

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Определите коэффициент неравномерности движения, если по участку за год перевозится 11 000 тыс. т, а размеры перевозок в максимальный месяц (август) составляют 1200 тыс. т.

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Write an introductory part in scientific style for the chapter titled: Analysis of existing methods for solving the problem of mathematical optimization of crop rotation planning

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لماذا لانشعر بدوران الأرض اريد تفسير رياضي علمي

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一个万维网网点有1000万个页面,平均每个页面有10个超链。读取一个页面平均要100ms。问要检索整个网点所需的最少时间

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广义表A=( a, ( b ), ( ( c ) ) ) ,那么Head(Tail(Tail(A)))是

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What does the correlation between the variables humidity and the target variable say is 0.86

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increase your calculation speed upto 10x torrent

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What is the nth term of 3 8 13 18?

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今天,桂畔小学三年级学生进行了数学计算能力检测,平均分为97.20,现在需要写100字左右的总结。

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Понятие Евклидово расстояние в теории нейросетей

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speed of computations

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If there are 33 students in a class and they have to select six out of 11 candidates, how many vote would be enough to get selected?

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На числовой прямой даны два отрезка: D = [17; 58] и C = [29; 80]. Укажите наименьшую возможную длину такого отрезка A, для которого логическое выражение (x ∈ D) → ((¬(x ∈ C)∧ ¬(x ∈ A)) → ¬(x ∈ D)) истинно (т. е. принимает значение 1) при любом значении переменной х.

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"На числовой прямой даны два отрезка: D = [17; 58] и C = [29; 80]. Укажите наименьшую возможную длину такого отрезка A, для которого логическое выражение (x ∈ D) → ((¬(x ∈ C)∧ ¬(x ∈ A)) → ¬(x ∈ D)) истинно (т. е. принимает значение 1) при любом значении переменной х." напиши код на python

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Met een decibelmeter meet men de geluidssterkte van een geluidsbron. De decibelmeter registreert op een afstand van 3,5 m van de bron een geluidssterkte van 49 dB. Bepaal de geluidssterkte op een afstand van 51m van de bron.

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Вероятность неточной сборки прибора равна 0,2. Найти вероятность того, что среди 500 приборов окажется от 410 до 430 (включительно) годных.

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soit le systeme linear s mx+2y+3z=3 (m-1)x+my+z=1 (m+1)x+my+(m-1)z=m-1 caluler le detreminant sresoudre le systeme par gausse

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in math analysis, use fourier series and find what is the value of sigma(1/(n^6)) for n=1 to infinity

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При регистрации в компьютерной системе каждому объекту сопоставляется идентификатор, состоящий из 15 символов и содержащий только символы из 8-символьного набора: А, В, C, D, Е, F, G, H. В базе данных для хранения сведений о каждом объекте отведено одинаковое и минимально возможное целое число байт. При этом используют посимвольное кодирование идентификаторов, все символы кодируют одинаковым и минимально возможным количеством бит. Кроме собственно идентификатора, для каждого объекта в системе хранятся дополнительные сведения, для чего отведено 24 байта на один объект. Определите объём памяти (в байтах), необходимый для хранения сведений о 20 объектах. В ответе запишите только целое число – количество байт.

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Обозначим через ДЕЛ(n, m) утверждение «натуральное число n делится без остатка на натуральное число m». Для какого наименьшего натурального числа А формула ДЕЛ(x, А) → (¬ДЕЛ(x, 21) + ДЕЛ(x, 35)) тождественно истинна (то есть принимает значение 1 при любом натуральном значении переменной x)?

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Задача. Вычислить минимальную чувствительность устройства для дальнего обнаружения БПЛА. Входные параметры Угол свечения источника: 120 градусов Мощность источника: 60 кандел Расстояние до объекта: 5 милометров Площадь рассеивания: от 1 квадратного метра Длина волны: 620 нанометров Мощность источника импульсная: 600 кандел Найти минимальную чувствительность приемника (фотодиода)

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Two forces are acting on an eyebolt. If the resultant force is to be 9kN directed along the positive x-axis, determine the magnitude of the force T acting on the eyebolt and its angle R

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Comment faire la tangente de 45°

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Comment faire le sinus de 45° sans calculatrice

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Ты можешь вывести вероятность события по формуле вероятности если я дам тебе данные для расчёта

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squareroot 2*49*500/5*0.2

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\frac{800\sqrt{13}}{\sqrt{\frac{3}{10}}}

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what's an infinitesimal?

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how are factorials used in finding probabilities?

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Halle la integral que determina el volumen del solido que se genera al girar la region que define las curvas dadas alrededor del eje x; y=3+2x-x2 ;y=3-x Marca la respuesta correcta: A)π∫(3 to 0)(8x-3x2-4x3+8x4)dx B)π∫(3 to 0)(18x-3x2-4x3+x4)dx C)π∫(3 to 0)(18x-3x2-4x3+x4)dx D)π∫(6 to 0)(18x-3x2-4x3-x4)dx

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give an example of trying to solve a problem to find the total probability of picking one thing from group A and another thing from group B

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explain what a terminal function is in math

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Explain the Triangular function. is it written using n?

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Calcule el volumen del sólido de revolución que se obtiene al hacer girar sobre el eje x, la región limitada por: y=cosx ; y=senx ; x=0; x=π/4

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Calcule el volumen del sólido de revolución que se obtiene al hacer girar sobre el eje x, la región limitada por: y=cosx ; y=senx ; x=0; x=π/4 Marca la respuesta correcta: A)π/2 B)π/25 C)π/5 D)π/3

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Halle el volumen del solido al hacer girar alrededor del eje x la región limitada por y=-x+1, y=0, x=0 Marca la respuesta correcta: A)π/5 B)π/3 C)π/2 D)π/4

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multiplicacion de 9 cifras el multiplicando x 2 cifras el multiplicador con sus pasos y comprobacion

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How much is 100 in 10000 in percentage

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Is 1% is 100

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Is 0.01% is 1

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In Monty Hall's generalized game there are cars as prizes behind doors. The rules are the same as before: You pick a door. Monty opens a door you didn't pick to reveal a goat. Then, you have the opportunity to switch your pick. Let denote the event of guessing a door with a car behind it, and let denote the event of guessing a door with a goat behind it on your initial pick. Let represent the event of losing the game if your strategy is always to switch doors. Explain the meaning of P(L and A).

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569 + 69 − 100 =

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582 ÷ 10 =

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Find the simple interest and the maturity value. $6500 at %8 for 3 years

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Доказать, что функция u = f(xy) + g(x/y), если f и g - дважды дифференцируемые функции, удовлетворяют уравнению x^2*d^2u/dx^2 - y^2*d^2u/dy^2 = -x*du/dx + y*du/dy

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Доказать, что функция u = f(xy) + g(x/y), если f и g - дважды дифференцируемые функции, удовлетворяют уравнению x^2d^2u/dx^2 - y^2d^2u/dy^2 = -xdu/dx + ydu/dy

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Доказать, что функция u = f(xy) + g(x/y), если f и g - дважды дифференцируемые функции, удовлетворяют уравнению x^2∂^2u/d∂^2 - y^2∂^2u/∂y^2 = -x∂u/∂x + y∂u/∂y

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Minden legal ́abb els ̋ofok ́u val ́os egy ̈utthat ́os polinom el ̋o ́all, mint komplex egy ̈utthat ́os els ̋ofok ́u polinomok szorzata.

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Considere três vetores, A, B e C, com as seguintes características: A tem módulo 12,92 cm e está orientado 54,6 graus acima da horizontal positiva. B tem módulo 4,65 cm e está orientado 34,4 graus abaixo da horizontal positiva. C tem módulo 16,5 cm e forma um ângulo de 118,6 graus com a horizontal positiva. a) Calcule o módulo (comprimento total do vetor) do vetor S, que representa a soma vetorial dos vetores A, B e C. Expresse sua resposta em cm, com três algarismos significativos.

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在一次统计估计过程中,如果误差比原始数据还要大,这意味着原始数据存在问题吗

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We need to seat 5 people - let's call them p1, p2, p3, p4, and p5 - in a row of 5 seats, so that the following 3 conditions are satisfied: 1. p2 should be farther away from the middle seat than p3. 2. p2 and p4 should be seated next to each other. 3. p1 and p3 flank p5. Give such a seating arrangement if possible. You must do the following: First, identify relevant information. Second, make a plan for how to solve the problem. Third, using the plan, attempt to solve the problem.

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A set of 4 cards are placed on a table. Each card has a person's age on one side and the name of a drink on the other side. The visible card faces are showing 50, 17, beer, and Pepsi, respectively. What card(s) should you turn over to test the truth of the proposition that if a card is showing an alcoholic drink on one side, then the age shown on the other side of the card is at least 21? You must do the following: First, identify relevant information. Second, make a plan for how to solve the problem. Third, using the plan, attempt to solve the problem.

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Can you give a bijection between the real numbers and the irrational numbers?

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Consider a = 3743736341 and b = 3743735341. Which is greater, a or b, and why?

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Is the absolute value of a given number always the same value as squaring the given number and then taking the principal square root?

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Is the absolute value of a given real number always the same value as the principal square root of the square of the given real number?

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Is the absolute value of a given real number always the same value as the doing the following in order?: 1) Multiply the given real number by itself. 2) Take the principal square root of step 1.

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Make a similar question completely different: Cara is hanging a poster that is 91 9191 centimeters ( cm ) (cm)left parenthesis, start text, c, m, end text, right parenthesis wide in her room. The center of the wall is 180 cm 180cm180, start text, c, m, end text from the right end of the wall. If Cara hangs the poster so that the center of the poster is located at the center of the wall, how far will the left and right edges of the poster be from the right end of the wall?

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Cara is hanging a poster that is 91 centimeters (cm) wide in her room. The center of the wall is 180 cm from the right end of the wall. If Cara hangs the poster so that the center of the poster is located at the center of the wall, how far will the left and right edges of the poster be from the right end of the wall?

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Доказать, что функция u = f(x + g(y)) удовлетворяет уравнению ∂u/∂x * ∂^2u/∂x∂y = ∂u/∂y * ∂^2u/∂x^2

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Доказать, что функция u = f(xy)+g(x/y) удовлетворяет уравнению x^2*∂^2u/∂x^2 - y^2*∂^2u/∂y^2 = -x*∂u/∂x + y*∂u/∂y

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Доказать, что функция u = f(xy)+g(x/y) удовлетворяет уравнению x^2∂^2u/∂x^2 - y^2∂^2u/∂y^2 = -x∂u/∂x + y∂u/∂y

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Is the absolute value of a given real number always the same value as doing the following calculations in order: 1. Compute the square of the given real number. 2. Compute the square of the result of step 1. 3. Take the 4th root of the result of step 2. You must do the following: First, identify relevant information for solving the problem. Second, make a plan for solving the problem. Third, attempt to solve the problem using the plan.

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I'll talk about summoners war. I want to do a calculation: There are 139 possible 4 star monsters that can be acquired hy summoning. There is a 8% chanche of getting a 4 star monster with a mystical scroll. The acquiring of one monster in particular when getting a 4 star monster is 1/139. With that information, what's the average of quantity of mystical scrolls needed to acquire all 139 monsters? (Assuming its the only source of getting them)

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750 grama je 560 din koliko je 1 kg

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α=cos−1(0,852969348) bereken a

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usefulness of mathematics

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How many N-digit numbers are there that read the same way from left to right and from right to left? Input data format 1 <= N <= 30 Output format One number: the answer to the problem

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x[n]=cos (1/2)n+cos (n/4) n sinyali için aşağıdakilerden hangisi doğrudur? a.Periyodiktir ve periyodu 8'dir. b.Periyodiktir ve periyodu π/4 'tür. c.Periyodiktir ve periyodu 4'tür. d.Periyodik değildir.

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calcola la media di questi voti, considera che 30l30=31/30 VOTO 30/30 30/30 28/30 28/30 30L30 30/30 30/30 30/30 30/30 30L30 27/30 30L30 30/30 30/30 30/30 28/30 29/30 30/30 30/30 30/30

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Explain the difference between Poisson distribution and exponential distribution.

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What method does anova use to solve variance problems

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Сколько существует десятичных 4-х значных чисел, в которых все цифры различны , и никакие две четные или две нечетные цифры не стоят рядом

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Calculate the radius of an iridium atom, given that Ir has an FCC crystal structure, a density of 22.4 g/cm3 , and an atomic weight of 192.2 g/mol.

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.线性规划模型介绍

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Перемножь скобки (1 + x + x^2/2 + x^3/6 + x^4/24)*(x - x^3/6 + x^5/120 - x^7/5040)

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线性规划模型的模型检验

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what function describes the average bounce of a kicked rugby ball?

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Дайте определение производной. Каков её геометрический и механический смысл?

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5的m次方=2的n次方=10 求mn分之m+m的值

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牛顿插值多项式

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Отношение порядка и упорядоченные множества

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The difference of joint probability, marginal probability, or conditional probability

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I want you to research previous Quina de São João results and, based on them and mathematical theories, give me 16 most probable combinations of 5 numbers. I know that you cannot give me results that will be 100% correct, It's ok. I am not doing this because I want to play, I am doing this just for research purposes.

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the definition of binomial, poission and hypergeometric

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what does ≡ in the equaiton "k ≡ k0 • Vmax"

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игла Бюффона как работает принцип

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A graph G has exactly two vertices with odd degree, let u and v. The are connected u and v with path?

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Посчитай сумму чисел от 1 до 64

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Convert a volume of 120 mL to cubic centimeters and cubic meters.

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Используя обычный симплекс метод Найти min z = 4x1-2x2+x3 x1-2x2+2x3>=9, x1-2x2>=5, x1-2x3>=-3, x1+x2+2x3>=3, x1+x2-x3<=0, x1+x2<=2, x1+x3<=6, 2x1-x2+x3<=12, 2x1-x2-2x3<=6, x1+x2-x3>=-3, x1>=0, x3>=0.

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Ha egy sorozat konvergens, akkor korlátos. ez igaz?

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Ha egy valós sorozat konvergens és korlátos, akkor monoton.

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Van olyan val ́os sorozat, ami korl ́atos, de nem konvergens. Ez igaz?

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Minden val ́os sorozatnak pontosan egy hat ́ar ́ert ́eke van. ez igaz?

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Ha egy sorozat végtelenbe tart hogy lehet konvergens és divergens is?

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z = r(cos(φ) + isin(φ)) komplex sz ́am n-edik (n ∈ N) hatv ́anya z n = r n(cos(nφ) + isin(φn)). ez igaz?

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como resolver 2(x2+32)-(2x2+8x+9)

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Какова точность модели если из 100 примеров поданных на вход модели, 73 из них были классифицированы верно

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Условия У Саши есть три любимых числа: 5, 6, 10. Кроме них, у Саши есть число N, не содержащее нулей. Он хочет сделать так, чтобы оно делилось хотя бы на одно из его любимых чисел. Для этого он K раз выполняет следующее: выбирает две цифры, стоящие на разных позициях, и меняет их местами. Помогите Саше найти вероятность того, что итоговое число будет делиться хотя бы на одно из любимых чисел. Примеры от постановщика задачи 1. N = 21, K = 1, Вероятность = 1 2. N = 145, K = 2, Вероятность = 0.333

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Исследуй функцию на экстремум u = y/x + 1/x + y

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Which probability is better (n-k-1)/(n-2) or (n-k-2)/(n-2)

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Исследовать на экстремум функцию u = y/x + 1/x + y

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In Monty Hall's generalized game there are k cars as prizes behind doors (1 <= k < n-1). The rules are the same as before: You pick a door. Monty opens a door you didn't pick to reveal a goat. Then, you have the opportunity to switch your pick. Let A denote the event of guessing a door with a car behind it, and let B denote the event of guessing a door with a goat behind it on your initial pick. Let L represent the event of losing the game if your strategy is always to switch doors. How can you use our calculation of P(W) to check your calculation of P(L)?

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Распиши ∆u для функции u = |y|sinx

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Consider the equation x^2+(y-2)^2=1 and the relation “(x, y) R (0, 2)”, where R is read as “has distance 1 of”. For example, “(0, 3) R (0, 2)”, that is, “(0, 3) has distance 1 of (0, 2)”. This relation can also be read as “the point (x, y) is on the circle of radius 1 with center (0, 2)”. In other words: “(x, y) satisfies this equation x^2+(y-2)^2=1, if and only if, (x, y) R (0, 2)”. Does this equation determine a relation between x and y?

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Дана матрица vecs размером 10х300 в формате pandas DataFrame, напишите код для нахождения среднего значения

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Найдите метрику MAE для Y=[1, 1, 1, 0, 0, 0] и предсказанного Y = [0.99, 0.98, 0.76, 0.3, 0.1, 0.001] (округлите до 4 знаков)

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для матрицы ошибок tp-6 fp-1 fn-2 tn -1 Найдите точность предсказания положительного класса. (точность из теории вероятности)

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给定节点x分别为1、2、3、4、6,函数值f(x)=lnx,端点条件s'(1)=1,s'(6)=1/6,求D1样条在x=5处的值,且要用三弯矩方程处理。要求用matlab编程,输出s(5)并绘制图形,图形包括原数据点

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请问一加一等于多少

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let f(x) = x^2 + 2x + a for x > 2; and 2a + 1 for x = 2; and bx - 3 for x < 2. continue at x = 2 for Evaluate S = a + b

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相对轴向载荷的计算公式是什么

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Определенный интеграл с переменным верхним пределом.

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Значение производной от интеграла, у которого верхним пределом является функция.

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с какой силой давит на поверхность каждое из 4х колёс автомобиля массой 1900 кг

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pretend you're the best mathematics professor in the world who is gonna write a book about Bernoulli distribution to take the hand of school students up to PhD level. what the table of contents might be? write a very comprehensive answer, write general titles then expand it, then expand it, then expand....until you reach that point where it's indecomposable anymore. use the 4096 token in this response

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Determine a calculation to fill a double entry table where each part goes from 1 to 10 with 1 and 1 being 1, 5 and 5 being 50 and 10 and 10 being 100.

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Fill in a double entry table. The columns have the values: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. The rows have the values: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. The junction of column 1 and row 1 must be 1, the junction of row 5 and column 5 must be 50, the junction of column 10 and row 10 must be 100. Whatever the row or column, a value must never be less than the previous value. Table values must be proportional or exponential. Only column 10 can reach 100. All numbers must be integers.

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Détermine un mode de calcul où 5 et 0 font 5, 5 et 5 font 50, et 5 et 10 font 75.

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kérek 5 számot 45 -ig

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Find a pattern in the values and describe it to me. 1727,16 1726,96 1726,94 1726,89 1724,76 1724,38 1724,88 1724,10 1723,09 1722,49 1723,80 1724,38 1724,61 1724,85 1724,34 1723,68 1723,66 1724,07 1724,17 1724,33 1725,12 1725,67 1726,48 1727,34 1727,59 1727,33 1726,52 1725,96 1725,87 1725,20 1724,86 1725,01 1724,76 1724,75 1724,72 1724,50 1724,26 1725,00 1726,10 1726,07 1726,28 1726,85 1727,54 1728,60 1728,93 1728,37 1727,85 1727,87 1728,21 1728,31 1727,81 1727,61 1727,97 1728,10 1728,55 1728,97 1728,92 1729,12 1729,15 1728,90 1728,97 1728,95 1729,90 1730,75 1732,66 1733,62 1732,73 1733,77 1734,18 1732,08 1728,66 1726,94 1726,99 1728,38 1729,74 1729,81 1729,48 1728,85 1728,47 1728,06 1727,82 1727,98 1727,51 1727,08 1727,62 1729,11 1731,00 1732,58 1732,30 1730,91 1730,70 1730,45 1729,74 1729,30 1728,88 1729,07 1728,87 1728,05 1727,34 1726,31 1726,50 1727,80 1728,68 1728,78 1728,48 1728,36 1728,23 1727,95 1727,10 1726,89 1727,59 1727,86 1727,62 1727,56 1728,48 1730,22 1730,96 1731,77 1732,13 1732,02 1732,52 1732,21 1732,24 1731,35 1730,89 1731,32 1731,18 1730,76 1730,75 1731,04 1730,47 1730,71 1731,20 1730,82 1730,54 1730,33 1730,67 1730,72 1730,73 1730,92 1731,73 1733,06 1733,78 1734,00 1733,92 1734,17 1733,79 1733,10 1732,62 1731,68 1730,50 1730,52 1733,10 1735,01 1735,06 1735,28 1735,27 1736,38 1737,00 1736,77 1735,83 1735,54 1735,52 1733,81 1732,85 1732,90 1733,21 1732,90 1732,18 1731,79 1732,50 1733,43 1733,64 1735,12 1736,37 1737,33 1738,39 1738,67 1738,81 1739,31 1739,36 1739,32 1739,71 1738,93 1737,95 1736,97 1736,68 1736,53 1736,26 1736,47 1736,93 1737,26 1736,66 1738,26 1739,98 1741,56 1743,09 1741,62 1740,32 1740,14 1740,09 1738,99 1740,49 1743,49 1744,28 1744,57 1743,72 1742,67 1741,73 1741,68 1742,16 1742,46 1744,12 1744,81 1744,17 1744,41 1743,16 1741,53 1740,50 1739,21 1738,67 1738,35 1738,29 1737,92 1737,93 1738,34 1738,51 1738,94 1739,09 1738,57 1738,28 1738,54 1738,87 1739,70 1740,27 1740,22 1740,41 1739,99 1739,77 1740,30 1738,10 1736,69 1733,26 1729,06 1726,40 1724,80 1726,58 1728,23 1729,27 1728,92 1729,46 1729,68 1729,20 1728,77 1729,04 1728,76 1728,14 1727,85 1727,30 1727,27 1727,03 1725,38 1724,33 1724,63 1724,37 1725,25 1724,90 1724,62 1725,84 1726,01 1726,71 1726,79 1725,47 1724,67 1723,92 1722,32 1720,82 1721,56 1721,91 1719,98 1718,89 1719,23 1718,85 1719,16 1720,42 1719,72 1719,24 1719,78

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Vérifier : P implique Q = Non(Q) implique Non (P)

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Vérifier : P implique Q = Non (Q) implique Non (P)

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Вероятность того, что при одном выстреле в мишень стрелок промахнется, равна 0,3. Какова вероятность того, что выстрелив по мишени 1 раз, стрелок попадет?

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how many generation is 1 million

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A. How many real solutions x are there to the equation x|x| + 1 = 3|x|? (a) 0, (b) 1, (c) 2, (d) 3, (e) 4. [Note that |x| is equal to x if x  0, and equal to −x otherwise.]

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A linear second-order differential equation is described by dot x_{1} = x_{2}(t) , dot x_{2} = u x_{1}(0) = 1 x_{2}(0) = 1 Find, by use of the Euler-Lagrange equations and transversality conditions, the optimal control u(t) which minimizes: a) J = integrate u ^ 2 dt from 0 to 1 x_{1}(1) = x_{2}(1) = 0

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C. The equation x2 − 4kx + y2 − 4y + 8 = k3 − k is the equation of a circle (a) for all real values of k. (b) ifandonlyifeither−4<k<−1ork>1. (c) ifandonlyifk>1. (d) ifandonlyifk<−1. (e) ifandonlyifeither−1<k<0ork>1.

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Ad un servizio di guardia medica arrivano in media 3.5 richieste ogni ora di interventi urgenti a domicilio. Calcolare la probabilità che in una stessa ora arrivi un numero di chiamate maggiore di 4. La risposta è 0,224, perché? dettagli passaggi

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if I have 10 tiles, each is 1 foot by 1 foot, how many square feet can I cover with them all?

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Найти координаты и длины векторов c=3a-2b и d=a-3b, если a (4, 0, 5) и b (6, 0, -8). Используй формулу длины вектора в пространстве в этой задаче

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The cost of 4kg of kale and 1.5kg of beetroot is 12.20

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Найти координаты и длины векторов c=3a-2b и d=a-3b, если a (4, 0, 5) и b (6, 0, -8)

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The cost of 4kg of radishes and 1.5kg of carrots is 14.8. The cost of 3kg of radishes and 2kg of carrots is 12.5. Work out the cost of 1kg of carrots and 1kg of radishes.

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Найти координаты и длины векторов c=3a+2b и d=a-3b, если вектор a (4, 0, 5) и d (0, 1, -2)

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Find the maximum and minimum values of x^2 - xy + y^2 - 2x + y

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write an article about how Maths is racist

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How do I divide by hand to get a result with a decimal instead of remainder?

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What is it called to divide and get a result with a decimal instead of a remainder?

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Create a math lesson for an autistic, ADHD-inducive child -- of whom -- is underscoring on mathematical skills. Let's start off the pedagogue with instructional, writable lesson plans: three-by-two digit multiplication; and proceed appropriately with questions along the way to be wrote down appropriately by the professor (unto the student's).

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Как из этого (1/5)^(x-1)-(1/5)^(x+1)=4,8 получилось это (1/5)^x-1*(1-(1/5)^2)=4,8

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3^(1+2x)+3^(2x+3)=10 реши как ученик 10 класса

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3^(1+2x)+3^(2x+3)=10 Сократи выражения на множители

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3^(1+2x)+3^(2x+3)=10 Ответ должен получиться -1/2

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dame un link de integrales definidas nivel super facil

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Desde la orilla del techo de un edificio de 370 pies de altura se dispara verticalmente hacia arriba una flecha a 78 millas/h. Calcular el tiempo que tarda en llegar al suelo.

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设计思维运用到数学教学

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2020 年中国研究生数学建模竞赛 C 题 面向康复工程的脑电信号分析和判别模型 本赛题包含 2 个附件(数据文件),四个课题任务。具体说明如下, 附件 1:P300 脑机接口实验数据提供了 5 个健康成年被试(S1-S5)的 P300 脑机接口实验数据,平均年龄为20 岁。在实验的过程中,要求每一位被试(被测试者)集中注意力。P300 脑机接口实验的设计如下:每位被试能够观察到一个由 36 个字符组成的字符矩阵,如图 3 所示,字符矩阵以行或列为单位(共 6 行 6 列)。每轮实验的设计流程:首先,提示被试注视“目标字符”,例如在图 3 的字符矩阵上方,出现的灰色字符“A”;其次,进入字符矩阵的闪烁模式,每次以随机的顺序闪烁字符矩阵的一行或一列,闪烁时长为 80 毫秒,间隔为 80 毫秒;最后,当所有行和列均闪烁一次后,则结束一轮实验。在被试注视“目标字符”的过程中,当目标字符所在行或列闪烁时,脑电信号中会出现 P300 电位;而当其他行和列闪烁时,则不会出现 P300 电位。上述实验流程为 1 轮,共重复 5 轮。 每位被试的 P300 脑电数据包含有 4 个文件,具体说明如下,train_data:训练用数据;train_event:训练数据的事件标签;test_data:测试用数据;test_event:测试数据的事件标签。训练用数据包括 12 个已知目标字符的数据(char01~char12),测试用数据包括 10 个待识别目标字符的数据(char13~char22)。每个字符矩阵闪烁实验中,脑电数据表格包含有 20 列(每列表示 1 个记录通道,记录通道依次进行编号,表1 为记录通道的标识符,图 5 对应了记录通道的位置),脑电数据表格的行表示样本点数据,采样频率为 250Hz。信号采集设备设置了参考电极和接地电极,即记录通道的信号为作用电极与参考电极之间的差值。 训练数据中的标签文件同样是以子表形式与实验数据相对应,子表的名称为“charXX(Y)”,XX 对应相应字符的序列号,Y 表示实际的目标字符。子表的内容包含了两列,第一列表示标签,第二列为采样点序号。每轮实验的起始标签为目标字符对应的标识符(字符矩阵中 36 个字符的标识符详见表 2,如“101”表示“A”),接下来为闪烁的行或列的标识符(详见图 6,如“2”表示第 2 行,“9”表示第 3 列),一轮实验的结束标签为“100”。在训练数据的事件标签文件中,第一行 给出了目标字符的标识符和对应的采样点序号,接下来是随机闪烁的行和列的标识符和对应的采样点序号,每轮实验以“100”标识符结束,共重复 5 次; 测试数据中的标签文件同样是以子表形式与实验数据相对应,子表的名称为“charXX”,XX 对应相应字符的序列号。在测试数据的事件标签文件中,第一行给出了待识别目标字符的标识符,统一表示为“666”,需要通过对脑电信号进行分析后,得到出现 P300 电位的行和列,并判断得到目标字符的识别结果。 附件 2:睡眠脑电数据提供 3000 个睡眠脑电特征样本及其标签,取自不同的健康成年人整夜睡眠过程。第一列为“已知标签”,用数字形式来表示不同的睡眠分期:清醒期(6),快速眼动期(5),睡眠 I 期(4),睡眠 II 期(3),深睡眠期(2);第二至五列为从原始时序列中计算得到的特征参数,依次包括“Alpha”,“Beta”,“Theta”,“Delta”,分别对应了脑电信号在“8-13Hz”,“14-25Hz”,“4-7Hz”和“0.5-4Hz”频率范围内的能量占比,特征参数单位为百分比。 根据以上附件所给出的数据来源和实验数据,请研究以下问题: 问题一:在脑-机接口系统中既要考虑目标的分类准确率,同时又要保证一定的信息传输速率。请根据附件 1 所给数据,设计或采用一个方法,在尽可能使用较少轮次(要求轮次数小于等于 5)的测试数据的情况下,找出附件 1 中 5 个被试测试集中的 10 个待识别目标,并给出具体的分类识别过程,可与几种方法进行对比,来说明设计方法的合理性。 问题二:由于采集的原始脑电数据量较大,这样的信号势必包含较多的冗余信息。根据图 5 和表 1,在 20 个脑电信号采集通道中,无关或冗余的通道数据不仅会增加系统的复杂度,且影响分类识别的准确率和性能。请分析附件 1 所给数据,并设计一个通道选择算法,给出针对每个被试的、更有利于分类的通道名称组合(要求通道组合的数量小于 20 大于等于 10,每个被试所选的通道可以不相同,具体的通道名称见图 5 和表 1)。基于通道选择的结果,进一步分析对于 所有被试都较适用的一组最优通道名称组合,并给出具体分析过程。为了方便参赛者对最优通道组合进行选择,赛题给出了测试数据(char13-char17)的结果,它们的字符分别是:M、F、5、2、I。 问题三:在 P300 脑-机接口系统中,往往需要花费很长时间获取有标签样本来训练模型。为了减少训练时间,请根据附件 1 所给数据,选择适量的样本作为有标签样本,其余训练样本作为无标签样本,在问题二所得一组最优通道组合的 基础上,设计一种学习的方法,并利用问题二的测试数据(char13-char17)检验方法的有效性,同时利用所设计的学习方法找出测试集中的其余待识别目标(char18-char22)。 问题四:根据附件 2 中所给出的特征样本,请设计一个睡眠分期预测模型,在尽可能少的训练样本的基础上,得到相对较高的预测准确率,给出训练数据和测试数据的选取方式和分配比例,说明具体的分类识别过程,并结合分类性能指 标对预测的效果进行分析。 2023年B题 生命体征精准监测 数据集描述:现有某医疗器械企业利用其开发的生命体征监测垫对志愿者进行监测,收集了被检测者睡眠阶段的 3 种生命体征:呼吸频(breath),心率(heart_rate),体动(totalMotion),相应的该时刻光纤反射转换成的电子信号(opticalpower),其中 1 秒钟内的数据如下所示:{‘breath’: 16, ‘heart_rate’: 68, ‘totalMotion’: 0, ‘opticalpower’: [-15.66, -15.66, -15.66, -15.66, -15.65, -15.66, -15.65, -15.66, -15.66, -15.65, -15.65, -15.66, -15.66, -15.65, -15.66, -15.66, -15.65, -15.66, -15.65, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.65, -15.66, -15.65, -15.65, -15.66, -15.65, -15.66, -15.65, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.65, -15.67, -15.65, -15.66, -15.65]},共有这类数据十万条,以json文件保存在“train”文件夹中。 请同学们完成以下任务: 问题 1. 由于电子信号序列可能很长或者不同的被检测者检测时间长度不同,所以电子信号长短可能不同,选取你们认为的足够长度的电子信号序列,对现有电子信号序列进行聚类分析,并对每一个聚类,分析其电子信号序列的特征及相应生命体征的特征。 问题 2. 监测仪器可以随时监测到被监测者的电子信号,需要将电子信号“翻译”为被监测者能理解的生命体征数据,请建立通过电子信号估计生命体征数据的数学模型。 问题 3. 就某一类疾病,比如阻塞性睡眠呼吸暂停、打鼾,请查阅资料了解其生命体征,进而分析其电子信号序列的特征。 问题 4. 除了该企业目前关注的3个生命体征,你们小组认为还有哪些生命体征应该受到关注? 2020C题和2023年B题有哪些相似之处

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请问未组合的十进制bcd数是什么?

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优化问题中小变量和大变量有什么区别

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2020 年中国研究生数学建模竞赛 C 题 面向康复工程的脑电信号分析和判别模型 本赛题包含 2 个附件(数据文件),四个课题任务。具体说明如下, 附件 1:P300 脑机接口实验数据提供了 5 个健康成年被试(S1-S5)的 P300 脑机接口实验数据,平均年龄为20 岁。在实验的过程中,要求每一位被试(被测试者)集中注意力。P300 脑机接口实验的设计如下:每位被试能够观察到一个由 36 个字符组成的字符矩阵,如图 3 所示,字符矩阵以行或列为单位(共 6 行 6 列)。每轮实验的设计流程:首先,提示被试注视“目标字符”,例如在图 3 的字符矩阵上方,出现的灰色字符“A”;其次,进入字符矩阵的闪烁模式,每次以随机的顺序闪烁字符矩阵的一行或一列,闪烁时长为 80 毫秒,间隔为 80 毫秒;最后,当所有行和列均闪烁一次后,则结束一轮实验。在被试注视“目标字符”的过程中,当目标字符所在行或列闪烁时,脑电信号中会出现 P300 电位;而当其他行和列闪烁时,则不会出现 P300 电位。上述实验流程为 1 轮,共重复 5 轮。 每位被试的 P300 脑电数据包含有 4 个文件,具体说明如下,train_data:训练用数据;train_event:训练数据的事件标签;test_data:测试用数据;test_event:测试数据的事件标签。训练用数据包括 12 个已知目标字符的数据(char01~char12),测试用数据包括 10 个待识别目标字符的数据(char13~char22)。每个字符矩阵闪烁实验中,脑电数据表格包含有 20 列(每列表示 1 个记录通道,记录通道依次进行编号,表1 为记录通道的标识符,图 5 对应了记录通道的位置),脑电数据表格的行表示样本点数据,采样频率为 250Hz。信号采集设备设置了参考电极和接地电极,即记录通道的信号为作用电极与参考电极之间的差值。 训练数据中的标签文件同样是以子表形式与实验数据相对应,子表的名称为“charXX(Y)”,XX 对应相应字符的序列号,Y 表示实际的目标字符。子表的内容包含了两列,第一列表示标签,第二列为采样点序号。每轮实验的起始标签为目标字符对应的标识符(字符矩阵中 36 个字符的标识符详见表 2,如“101”表示“A”),接下来为闪烁的行或列的标识符(详见图 6,如“2”表示第 2 行,“9”表示第 3 列),一轮实验的结束标签为“100”。在训练数据的事件标签文件中,第一行 给出了目标字符的标识符和对应的采样点序号,接下来是随机闪烁的行和列的标识符和对应的采样点序号,每轮实验以“100”标识符结束,共重复 5 次; 测试数据中的标签文件同样是以子表形式与实验数据相对应,子表的名称为“charXX”,XX 对应相应字符的序列号。在测试数据的事件标签文件中,第一行给出了待识别目标字符的标识符,统一表示为“666”,需要通过对脑电信号进行分析后,得到出现 P300 电位的行和列,并判断得到目标字符的识别结果。 附件 2:睡眠脑电数据提供 3000 个睡眠脑电特征样本及其标签,取自不同的健康成年人整夜睡眠过程。第一列为“已知标签”,用数字形式来表示不同的睡眠分期:清醒期(6),快速眼动期(5),睡眠 I 期(4),睡眠 II 期(3),深睡眠期(2);第二至五列为从原始时序列中计算得到的特征参数,依次包括“Alpha”,“Beta”,“Theta”,“Delta”,分别对应了脑电信号在“8-13Hz”,“14-25Hz”,“4-7Hz”和“0.5-4Hz”频率范围内的能量占比,特征参数单位为百分比。 根据以上附件所给出的数据来源和实验数据,请研究以下问题: 问题一:在脑-机接口系统中既要考虑目标的分类准确率,同时又要保证一定的信息传输速率。请根据附件 1 所给数据,设计或采用一个方法,在尽可能使用较少轮次(要求轮次数小于等于 5)的测试数据的情况下,找出附件 1 中 5 个被试测试集中的 10 个待识别目标,并给出具体的分类识别过程,可与几种方法进行对比,来说明设计方法的合理性。 问题二:由于采集的原始脑电数据量较大,这样的信号势必包含较多的冗余信息。根据图 5 和表 1,在 20 个脑电信号采集通道中,无关或冗余的通道数据不仅会增加系统的复杂度,且影响分类识别的准确率和性能。请分析附件 1 所给数据,并设计一个通道选择算法,给出针对每个被试的、更有利于分类的通道名称组合(要求通道组合的数量小于 20 大于等于 10,每个被试所选的通道可以不相同,具体的通道名称见图 5 和表 1)。基于通道选择的结果,进一步分析对于 所有被试都较适用的一组最优通道名称组合,并给出具体分析过程。为了方便参赛者对最优通道组合进行选择,赛题给出了测试数据(char13-char17)的结果,它们的字符分别是:M、F、5、2、I。 问题三:在 P300 脑-机接口系统中,往往需要花费很长时间获取有标签样本来训练模型。为了减少训练时间,请根据附件 1 所给数据,选择适量的样本作为有标签样本,其余训练样本作为无标签样本,在问题二所得一组最优通道组合的 基础上,设计一种学习的方法,并利用问题二的测试数据(char13-char17)检验方法的有效性,同时利用所设计的学习方法找出测试集中的其余待识别目标(char18-char22)。 问题四:根据附件 2 中所给出的特征样本,请设计一个睡眠分期预测模型,在尽可能少的训练样本的基础上,得到相对较高的预测准确率,给出训练数据和测试数据的选取方式和分配比例,说明具体的分类识别过程,并结合分类性能指 标对预测的效果进行分析。 2023年B题 生命体征精准监测 数据集描述:现有某医疗器械企业利用其开发的生命体征监测垫对志愿者进行监测,收集了被检测者睡眠阶段的 3 种生命体征:呼吸频(breath),心率(heart_rate),体动(totalMotion),相应的该时刻光纤反射转换成的电子信号(opticalpower),其中 1 秒钟内的数据如下所示:{‘breath’: 16, ‘heart_rate’: 68, ‘totalMotion’: 0, ‘opticalpower’: [-15.66, -15.66, -15.66, -15.66, -15.65, -15.66, -15.65, -15.66, -15.66, -15.65, -15.65, -15.66, -15.66, -15.65, -15.66, -15.66, -15.65, -15.66, -15.65, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.65, -15.66, -15.65, -15.65, -15.66, -15.65, -15.66, -15.65, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.66, -15.65, -15.67, -15.65, -15.66, -15.65]},共有这类数据十万条,以json文件保存在“train”文件夹中。 请同学们完成以下任务: 问题 1. 由于电子信号序列可能很长或者不同的被检测者检测时间长度不同,所以电子信号长短可能不同,选取你们认为的足够长度的电子信号序列,对现有电子信号序列进行聚类分析,并对每一个聚类,分析其电子信号序列的特征及相应生命体征的特征。 问题 2. 监测仪器可以随时监测到被监测者的电子信号,需要将电子信号“翻译”为被监测者能理解的生命体征数据,请建立通过电子信号估计生命体征数据的数学模型。 问题 3. 就某一类疾病,比如阻塞性睡眠呼吸暂停、打鼾,请查阅资料了解其生命体征,进而分析其电子信号序列的特征。 问题 4. 除了该企业目前关注的3个生命体征,你们小组认为还有哪些生命体征应该受到关注? 2020C题和2023年B题有在算法选择方面有哪些相似之处

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2020 年中国研究生数学建模竞赛 C 题 面向康复工程的脑电信号分析和判别模型 本赛题包含 2 个附件(数据文件),四个课题任务。具体说明如下, 附件 1:P300 脑机接口实验数据提供了 5 个健康成年被试(S1-S5)的 P300 脑机接口实验数据,平均年龄为20 岁。在实验的过程中,要求每一位被试(被测试者)集中注意力。P300 脑机接口实验的设计如下:每位被试能够观察到一个由 36 个字符组成的字符矩阵,如图 3 所示,字符矩阵以行或列为单位(共 6 行 6 列)。每轮实验的设计流程:首先,提示被试注视“目标字符”,例如在图 3 的字符矩阵上方,出现的灰色字符“A”;其次,进入字符矩阵的闪烁模式,每次以随机的顺序闪烁字符矩阵的一行或一列,闪烁时长为 80 毫秒,间隔为 80 毫秒;最后,当所有行和列均闪烁一次后,则结束一轮实验。在被试注视“目标字符”的过程中,当目标字符所在行或列闪烁时,脑电信号中会出现 P300 电位;而当其他行和列闪烁时,则不会出现 P300 电位。上述实验流程为 1 轮,共重复 5 轮。 每位被试的 P300 脑电数据包含有 4 个文件,具体说明如下,train_data:训练用数据;train_event:训练数据的事件标签;test_data:测试用数据;test_event:测试数据的事件标签。训练用数据包括 12 个已知目标字符的数据(char01~char12),测试用数据包括 10 个待识别目标字符的数据(char13~char22)。每个字符矩阵闪烁实验中,脑电数据表格包含有 20 列(每列表示 1 个记录通道,记录通道依次进行编号,表1 为记录通道的标识符,图 5 对应了记录通道的位置),脑电数据表格的行表示样本点数据,采样频率为 250Hz。信号采集设备设置了参考电极和接地电极,即记录通道的信号为作用电极与参考电极之间的差值。 训练数据中的标签文件同样是以子表形式与实验数据相对应,子表的名称为“charXX(Y)”,XX 对应相应字符的序列号,Y 表示实际的目标字符。子表的内容包含了两列,第一列表示标签,第二列为采样点序号。每轮实验的起始标签为目标字符对应的标识符(字符矩阵中 36 个字符的标识符详见表 2,如“101”表示“A”),接下来为闪烁的行或列的标识符(详见图 6,如“2”表示第 2 行,“9”表示第 3 列),一轮实验的结束标签为“100”。在训练数据的事件标签文件中,第一行 给出了目标字符的标识符和对应的采样点序号,接下来是随机闪烁的行和列的标识符和对应的采样点序号,每轮实验以“100”标识符结束,共重复 5 次; 测试数据中的标签文件同样是以子表形式与实验数据相对应,子表的名称为“charXX”,XX 对应相应字符的序列号。在测试数据的事件标签文件中,第一行给出了待识别目标字符的标识符,统一表示为“666”,需要通过对脑电信号进行分析后,得到出现 P300 电位的行和列,并判断得到目标字符的识别结果。 附件 2:睡眠脑电数据提供 3000 个睡眠脑电特征样本及其标签,取自不同的健康成年人整夜睡眠过程。第一列为“已知标签”,用数字形式来表示不同的睡眠分期:清醒期(6),快速眼动期(5),睡眠 I 期(4),睡眠 II 期(3),深睡眠期(2);第二至五列为从原始时序列中计算得到的特征参数,依次包括“Alpha”,“Beta”,“Theta”,“Delta”,分别对应了脑电信号在“8-13Hz”,“14-25Hz”,“4-7Hz”和“0.5-4Hz”频率范围内的能量占比,特征参数单位为百分比。 根据以上附件所给出的数据来源和实验数据,请研究以下问题: 问题一:在脑-机接口系统中既要考虑目标的分类准确率,同时又要保证一定的信息传输速率。请根据附件 1 所给数据,设计或采用一个方法,在尽可能使用较少轮次(要求轮次数小于等于 5)的测试数据的情况下,找出附件 1 中 5 个被试测试集中的 10 个待识别目标,并给出具体的分类识别过程,可与几种方法进行对比,来说明设计方法的合理性。 问题二:由于采集的原始脑电数据量较大,这样的信号势必包含较多的冗余信息。根据图 5 和表 1,在 20 个脑电信号采集通道中,无关或冗余的通道数据不仅会增加系统的复杂度,且影响分类识别的准确率和性能。请分析附件 1 所给数据,并设计一个通道选择算法,给出针对每个被试的、更有利于分类的通道名称组合(要求通道组合的数量小于 20 大于等于 10,每个被试所选的通道可以不相同,具体的通道名称见图 5 和表 1)。基于通道选择的结果,进一步分析对于 所有被试都较适用的一组最优通道名称组合,并给出具体分析过程。为了方便参赛者对最优通道组合进行选择,赛题给出了测试数据(char13-char17)的结果,它们的字符分别是:M、F、5、2、I。 问题三:在 P300 脑-机接口系统中,往往需要花费很长时间获取有标签样本来训练模型。为了减少训练时间,请根据附件 1 所给数据,选择适量的样本作为有标签样本,其余训练样本作为无标签样本,在问题二所得一组最优通道组合的 基础上,设计一种学习的方法,并利用问题二的测试数据(char13-char17)检验方法的有效性,同时利用所设计的学习方法找出测试集中的其余待识别目标(char18-char22)。 问题四:根据附件 2 中所给出的特征样本,请设计一个睡眠分期预测模型,在尽可能少的训练样本的基础上,得到相对较高的预测准确率,给出训练数据和测试数据的选取方式和分配比例,说明具体的分类识别过程,并结合分类性能指 标对预测的效果进行分析。

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2016 年全国研究生数学建模竞赛 B 题 具有遗传性疾病和性状的遗传位点分析 人体的每条染色体携带一个 DNA 分子,人的遗传密码由人体中的 DNA 携带。DNA 是由 分别带有 A,T,C,G 四种碱基的脱氧核苷酸链接组成的双螺旋长链分子。在这条双螺旋的长链 中,共有约 30 亿个碱基对,而基因则是 DNA 长链中有遗传效应的一些片段。在组成 DNA 的 数量浩瀚的碱基对(或对应的脱氧核苷酸)中,有一些特定位置的单个核苷酸经常发生变异 引起 DNA 的多态性,我们称之为位点。染色体、基因和位点的结构关系见图 1. 在 DNA 长链中,位点个数约为碱基对个数的 1/1000。由于位点在 DNA 长链中出现频 繁,多态性丰富,近年来成为人们研究 DNA 遗传信息的重要载体,被称为人类研究遗传学 的第三类遗传标记。 大量研究表明,人体的许多表型性状差异以及对药物和疾病的易感性等都可能与某些 位点相关联,或和包含有多个位点的基因相关联。因此,定位与性状或疾病相关联的位点在 染色体或基因中的位置,能帮助研究人员了解性状和一些疾病的遗传机理,也能使人们对致 病位点加以干预,防止一些遗传病的发生。 近年来,研究人员大都采用全基因组的方法来确定致病位点或致病基因,具体做法是: 招募大量志愿者(样本),包括具有某种遗传病的人和健康的人,通常用 1 表示病人,0 表 示健康者。 对每个样本,采用碱基(A,T,C,G)的编码方式来获取每个位点的信息(因为染色体 具有双螺旋结构,所以用两个碱基的组合表示一个位点的信息);如表 1 中,在位点 rs100015 位置,不同样本的编码都是 T 和 C 的组合,有三种不同编码方式 TT,TC 和 CC。类似地其他 的位点虽然碱基的组合不同,但也只有三种不同编码。研究人员可以通过对样本的健康状况 和位点编码的对比分析来确定致病位点,从而发现遗传病或性状的遗传机理。 本题包含以下问题: 问题一、请用适当的方法,把 genotype.dat 中每个位点的碱基(A,T,C,G) 编码方式转化成数 值编码方式,便于进行数据分析。 问题二、根据附录中 1000 个样本在某条有可能致病的染色体片段上的 9445 个位点的编码 信息(见 genotype.dat)和样本患有遗传疾病 A 的信息(见 phenotype.txt 文件)。设计或采用 一个方法,找出某种疾病最有可能的一个或几个致病位点,并给出相关的理论依据。 问题三、同上题中的样本患有遗传疾病 A 的信息(phenotype.txt 文件)。现有 300 个基因, 每个基因所包含的位点名称见文件夹 gene_info 中的 300 个 dat 文件,每个 dat 文件列出了 对应基因所包含的位点(位点信息见文件 genotype.dat)。由于可以把基因理解为若干个位点 组成的集合,遗传疾病与基因的关联性可以由基因中包含的位点的全集或其子集合表现出来 请找出与疾病最有可能相关的一个或几个基因,并说明理由。 问题四、在问题二中,已知 9445 个位点,其编码信息见 genotype.dat 文件。在实际的研究 中,科研人员往往把相关的性状或疾病看成一个整体,然后来探寻与它们相关的位点或基因。 试根据 multi_phenos.txt 文件给出的 1000 个样本的 10 个相关联性状的信息及其 9445 个位 点的编码信息(见 genotype.dat),找出与 multi_phenos.txt 中 10 个性状有关联的位点。

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Hiw much is 1 plus 1

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N元线性方程组ax=b的求解公式

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二进制数11111110转换为压缩的BCD码的形式是什么

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what is 2x2

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544 and 760 are both three-digit numbers whose digits add to 13. What is the smallest three-digit number whose digits add to 13?

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رابطه ریاضی بین تعداد دارایی های مورد نیاز در انبار و تعمیرات سیستم را بنویسید

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You are given the following 7 activities that wish to use a lecture hall, which can only be used by one activity at a time. What’s the maximum number of activities that you can schedule in this lecture hall?

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You are given a file consisting of 4 distinct characters, a-d. Assume that the frequency of each character is 25%. If the file has a total of N characters, what’s the total number of bits you would need to encode this file using Huffman coding?

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After running 2 laps of a 5 lap race, an athlete still had 1280 metres to go. Let l be the length of one lap in metres. Write an equation to represent this situation

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You are given an array of N unsorted numbers and are asked to design an algorithm that returns the median (the element that stays in the middle when the numbers are sorted). How fast can you solve this problem?

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A friend of yours tells you that s/he has found a new comparison-based sorting algorithm to sort an array of N numbers. Which of the following can NOT be the running time of your friend’s sorting algorithm? a) O(N^1.76) b) O(N^2) c) O(NlogN) d) O(N)

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t=2m + d/4. m=63 d=4

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fyy (x, y) if f(x, y ) = In x/y a. 2lnx/y^3 b. 2lnx/y c. lnx d. 0 e. lnx/y^3

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You are given an undirected graph with 12 vertices. If this graph is bipartite, what is the maximum number of edges this graph can have?

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You are given an undirected graph with 12 vertices. If this graph is bipartite, what is the maximum number of edges this graph can have? a) 36 b) 12 c) 32 d) 35

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رابطه ریاضی بین تعداد دارایی های مورد نیاز در انبار و تعمیرات سیستم را بیان کنید

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z  lnx  y

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Find the domain of the function using interval notation. f(x)= \frac{ \sqrt{x-6} }{ \sqrt{x-4}

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give me an example of a piecewise function that i could use to sketch a graph. write the domain in interval notation

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in college algebra, what is a piecewise function_

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give me two examples of random piecewise functions

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công thức vận tốc

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8位的A/D转换器分辨率是多少

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我们规定两人轮流做一个工程是指,第一个人先做一个小时,第二个人做一个小时,然后再由第一个人做一个小时,然后又由第二个人做一个小时,如此反复,做完为止。如果甲、乙轮流做一个工程需要9.8小时,而乙、甲轮流做同样的工程只需要9.6小时,那乙单独做这个工程需要多少小时?

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甲、乙两地相距120千米,客车和货车同时从甲地出发驶向乙地,客车到达乙地后立即沿原路返回,在途中的丙地与货车相遇。之后,客车和货车继续前进,各自到达甲地和乙地后又马上折回,结果两车又恰好在丙地相遇。已知两车在出发后的2小时首次相遇,那么客车的速度是每小时多少千米?

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Сколько будет 45665+557754566

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y”-5y’+4y=3e^x +x

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5N=55, N=?

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帮我计算歌德巴赫猜想

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请写一篇关于初一学生数学培优辅差计划

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35*%40 + x*%60 = 50 x kaçtır?

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Вычисление координат вершин теодолитного хода( дирекционный угол равен 9°23 ́): Точки Углы, β измеренные 1 2 I 82°44 ́ II 179°29 ́ III 92°51 ́ IV 90°45 ́ V 71°29 ́ VI 264°24 ́ VII 275°49 ́ VIII 95°00 ́ IX 88°43 ́

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чему равно i^i

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Количество способов расстановки белых фигур (2 коня, 2 ладьи, 2 слона, ферзя и короля) на первой линии шахматной доски равно

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Номер перестановки 12354 при их лексикографическом упорядочивании, если начинать с перестановки 12345 равен Ответ

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What sort of triangles occur in every regular polygon, when each vertex is joined to the centre by a straight line? Except a hexagon

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2的平方

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Ha an konvergens sorozat ́es bn diverg ́al, akkor a a1, b1, a2, b2, a3, b3, . . . sorozat is diverg ́al.

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Egy valós sorozat in muma a sorozat legnagyobb alsó korlátja.

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Minden komplex együtthatós, legalább els®fokú polinomnak van legalább egy komplex gyöke.

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if y=(x/(1+x))^x,dy/dx=?

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50 combinações de dezenas

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Помогите высчитать % есть сумма 140621,56 это если сложить эти числа -> (48508+ 92113)с этой суммы капает процент 6.9 мне нужно понять какой процент будет капать на число 48508 и на 92113. переведите потом проценты в число

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Aisha sells 3 products: product A; product B and product C. In March, Aisha sold 3,570 units in total. The numbers of units sold for products A, B and C is in the ratio 10:5:2 respectively. How many units of B and C combined were sold by Aisha in march? (A) 1,470 units (B) 1,580 units (C) 1,690 units (D) 1,800 units (E) 1,910 units

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x,y are real numbers. 4x+(3y+4)i=21+7i Evaluate y. Possible Answers: y=1 y=6.25 y=5.25 y=−1 y=−5.25

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if each event has a 97% chance to occur, what is the chance of the event ocurring 8 times in 10 attempts?

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Qual a fórmula de sequência de Fibonacci?

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The McLaurin formula of order 2n with Peano type coterms for the function f (x) =sinx^2 is?

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if x=-3 and y=4 then what is: (2y + xy -x2 )

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How to multiply 52C2 * 51

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with facttising, how do 5n + 5 equal 5 (n+1)

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factorise this: 5n + 5

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show me how tofactorise this: 5n + 5

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How many possible suits are there for 2 cards in numerical order

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Show how there are 16 ways for two cards in numerical sequence to have a suit.

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assuming there are 12 possible straights made up of 2 cards, how are there 16 possible suits for these cards?

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Ha an konvergens sorozat ́es bn diverg ́al, akkor a a1, b1, a2, b2, a3, b3, . . . sorozat is konverg ́al.

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Ha an konvergens sorozat ́es bn is konverg ́al, akkor a a1, b1, a2, b2, a3, b3, . . . sorozat is konverg ́al.

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