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Check my CALCULUS work, please! :) Posted by Samantha on Monday, November 11, 2013 at 9:24am. Question 1. lim h->0(sqrt 49+h-7)/h = 14 1/14*** 0 7 -1/7 Question 2. lim x->infinity(12+x-3x^2)/(x^2-4)= -3*** -2 0 2 3 Question 3. lim x->infinity (5x^3+x^7)/(e^x)= infinity*** 0 -1 3 Question 4. Given t...
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How do I differentiate a vector times vector? May 13th 2009, 11:17 AM Twig How do I differentiate a vector times vector? Hi This came up as I was reading about Non-linear least squares fitting. We have data points $(t_{i},y_{i}) \, i=1 \cdots \, m$ . We wish to find the vector $\vec{x}$ of paramete...
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Power Series for Indefinite Integral April 25th 2010, 08:42 PM #1 Newbie Joined Apr 2010 Posts 8 Power Series for Indefinite Integral Find a power series for the indefinite integral of cos(x^2) dx. Use both sigma notation and expanded form, including the first four nonzero terms of the series. $\cos...
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solving the equation Solve: 2x + 3 = |4x - 7| Thanks for your help! There are two cases to consider: 1. 4x-7>=0 then we need to solve: 2x+3 = 4x-7 which has solution: x=5, which we need to check satisfies the assumed condition 4x-7 >=0, which it does so x=5 is a solution. 2. 4x-7<0 then we need to solve: 2x+3 = -(4x-7...
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Calc: Problem Solving December 14th 2008, 04:12 PM 09Ashaw Calc: Problem Solving THe graph of y = f (x) passes through the origin. the arc length of the curve from (0,0) to (x, f(x)) is given by s(x) = (integral from a to x) of the square roote of 1 + e ^ t dt... Identify the function f. December 14th 2008,...
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Could someone check my answer. expected value a utility February 6th 2008, 04:30 PM #1 Newbie Joined Feb 2008 Posts 12 Could someone check my answer. expected value a utility For the payoff table below, the decision maker will use P(s1) = .15, P(s2) = .5, and P(s3) = .35. s1 s2 s3 d1 -5000 1000...
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Question about Residual Norms April 21st 2011, 04:33 PM #1 Newbie Joined Apr 2011 Posts 2 Suppose A is 4x4, with 1s in the positions (1,2), (2,3), (3,4), & (4,1), and zeros everywhere else. Let b= $e_{1}$ and $x_{0}=0$. How can I show that||r_0||_2 = ||r_1||_2=||r_3||_2 ? r is the residual--that is, r...
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Normal to a space curve. March 17th 2009, 04:17 AM #1 Senior Member Joined Jul 2006 Posts 364 Normal to a space curve. The question is: Find the Cartesian form of the equation for the plane that is perpendicular to the space curve $\mathbf{r}(t)=16t^{\frac{1}{4}}\mathbf{i} - 4t^{\frac{3}{4}}\mat...
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4 vectors May 9th 2007, 07:50 PM kolahalb 4 vectors Let us define 4 vector by 4 co-ordinates (x1,x2,x3,x4) where (x1,x2,x3) are space components (like x,y,z) and x4 is related to time as x4=ict.Express the following equations in tensor notation. (i)The continuity equation: div J+(del*rho/del t)=0 (ii)T...
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integrable function March 13th 2009, 12:53 PM manjohn12 integrable function Suppose $f$ is Riemann integrabe on $[a,b]$. Let $\xi$ be any number in $[a,b]$, and let $r$ be any real number different from $f(\xi)$. Define a function $g$ as follows: $g(x) = \begin{cases} f (x) \ \ \ \ \text{if} \ x eq \xi \\ r ...
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Is the range of the integers 6, 3, y, 4, 5, and x greater Author Message TAGS: Is the range of the integers 6, 3, y, 4, 5, and x greater [#permalink] 25 Jun 2012, 02:03 1 ...
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quadratic equations? November 12th 2008, 08:36 AM #1 Newbie Joined Nov 2008 Posts 1 quadratic equations? AT is a tangent at T to a circle, centre O. OT = x cm AT = (x+5) cm OA = (x+8) cm a) Show that x^2-6x-39=0 b) Solve the equation x^2-6x-39=0 to find the radius of the circle Give your...
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Orthogonal polynomials/functions on the interval [0,1] but with same weight as Gegenbauer polynomials up vote 4 down vote favorite 1 I am looking for an othogonal basis of functions over the interval $[0,1]$ with weight function $(1-x^2)^{\alpha-1/2}$. Gegenbauer polynomials are frustratingly close to what I need, but...
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Wolfram Demonstrations Project Applications of Driving-Force and McCabe-Thiele Diagrams to Binary Distillation Processes The driving-force diagram for a constant relative volatility binary mixture is obtained by plotting versus , where and are the liquid and vapor mole fractions of the light component. Explicitly, the...
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Homework Help Posted by Anonymous on Sunday, November 18, 2007 at 5:16pm. A population of insects increases at a rate of 250 + 16t +0.3t^2 insects per day. Find the insect population after 3 days, assuming that there are 40 insects at t=0. • MATH - Reiny, Sunday, November 18, 2007 at 10:34pm d(Insects)/dt = 25...
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Approximate Cubic Lie Derivations Abstract and Applied Analysis Volume 2013 (2013), Article ID 425784, 5 pages http://dx.doi.org/10.1155/2013/425784 Research Article Approximate Cubic Lie Derivations ^1Faculty of Management, University of Primorska, Cankarjeva 5, 6104 Koper, Slovenia ^2Faculty of Logistics, Universi...
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Prove sqrt(6) is irrational 1) Each SQRT(Prime Number) is irrational & 2) SQRT(Prime Number 1) * SQRT(Prime Number 2) is irrational if Prime Number 1 is not equal to Prime Number 2. The problem is that you never really establish the truth of either point 1 or point 2 anywhere in the proof kx21 I still think tha...
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the encyclopedic entry of geodetic longitude Geodetic systems or geodetic data are used in geodesy , navigation , surveying by cartographers and satellite navigation systems to translate positions indicated on their products to their real position on earth . The systems are needed because the earth is n...
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Need help with an interesting limit November 16th 2012, 08:17 AM #1 Newbie Joined Nov 2012 From Pocasset, OK Posts 1 Need help with an interesting limit Greetings all! Here's an interesting problem I could use advice & council on. I'm attaching a short Word file with equations and a picture. I h...
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Finite Difference Solution of Elastic-Plastic Thin Rotating Annular Disk with Exponentially Variable Thickness and Exponentially Variable Density Journal of Materials Volume 2013 (2013), Article ID 809205, 9 pages http://dx.doi.org/10.1155/2013/809205 Research Article Finite Difference Solution of Elastic-Plastic Thi...
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Second Question about Reversing Equations March 24th 2011, 11:55 PM #1 Newbie Joined May 2010 Posts 11 Thanks 1 Second Question about Reversing Equations Here another similar question but more complicated than former: $<br /> \begin{cases}<br /> & u=a^3+3b^2d+3bc^2+3ce^2+3d^2e+6abe+6acd \\ <br /...
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Homework Help Posted by Holly on Thursday, December 10, 2009 at 6:21pm. How would you solve this? I don't even know how to begin this... I know the answer is 4m^2 + 3m + 19 + (64/m-3) but I want to know how to do it incase its on the test. 4m^3 - 9m^2 + 10m + 7 / m-3 • algebra - Emily, Thursday, December 10, 2009 ...
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set of odd integers proof February 24th 2010, 02:21 PM james121515 set of odd integers proof I am working on a simple set theory proof involving the definition of odd numbers, and so far I've done one containment. I would guess that if thiss is correct, then the other containment would be equally simple. Doe...
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the encyclopedic entry of absolutely convergent In mathematics , a series is the sum of the terms of a sequence of numbers. Given a sequence $left \left\{ a_1, a_2, a_3,dots right \right\}$, the nth partial sum $S_n$ is the sum of the first n terms of the sequence, that is, $S_n = sum_\left\{k=1\right\}^n...
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About Euler's constant (2)... November 6th 2009, 01:35 AM chisigma About Euler's constant (2)... Given ... $\gamma(z)= \int_{0}^{\infty} t^{z}\cdot e^{-t}\cdot dt$ (1) ... and the Euler's constant... $\gamma = \lim_{n \rightarrow \infty} \{\sum_{k=1}^{n} \frac{1}{k} - \ln n \}= .577215664901...$ (...
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Public Key Encryption Page 3 of 3 Follow ...
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Applications of Integration: Volume Problem December 7th 2008, 02:38 PM #1 Newbie Joined Oct 2008 Posts 11 Applications of Integration: Volume Problem Hello, I have a two problem in which I find difficult to understand. Basically, it's the wording of the problems that's confusing the heck out of me. ...
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Homework Help Posted by thaokieu on Sunday, January 30, 2011 at 8:02pm. During the first 18 minutes of a 1.0-hour trip, a car has an average speed of 11 m/s. What must the average speed of the car be during the last 42 minutes of the trip be if the car is to have an average speed of 21 m/s for the entire trip? • ph...
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Compute an integral yes, but can you find another way to solve it? Another way? What does (s)he want? Hmm ... Let $I=\int_0^1\frac{\ln x}{\sqrt{x-x^2}}\mathrm dx$ and let $J=\int_0^1\frac{\ln x}{\sqrt{1-x^2}}\mathrm dx$. The substitution $x=u^2$ shows that $I=4J$. The substituion $y=1-x$ shows that $I=\int_0^1\frac{\l...
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Logistic Growth April 10th 2010, 04:03 PM WahooMan Logistic Growth q(t) = a / 1 + be^-kt where b = a / q(initial) - 1 and k > 0 is constant. Assuming a > q(initial) > 0, prove that the function q is everywhere increasing by analyzing its first derivative. Do not use specific values for any of the const...
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Detection and Isolation of Simultaneous Additive and Parametric Faults in Nonlinear Stochastic Dynamical Systems Mathematical Problems in Engineering Volume 2012 (2012), Article ID 848519, 17 pages http://dx.doi.org/10.1155/2012/848519 Research Article Detection and Isolation of Simultaneous Additive and Parametric F...
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Help please with reflection problem!? Posted by Knights on Friday, February 22, 2013 at 2:29pm. A laser is shot from vertex A of square ABCD of side length 1, towards point P on BC so that BP = 3/4. The laser reflects off the sides of the square, until it hits another vertex, at which point it stops. What is the lengt...
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quad. residues Last edited by bigb; October 26th 2008 at 06:45 PM. this is false! the correct statement is: $x^n+1$ factors as a product of $\tau(m)$ irreducible polynomials, where $\tau(m)$ is the number of divisors of $m$. here is why: so we have $n=2^km,$ for some integer $k \geq 0.$ see that $A=\{2^{k+1}d: \ d \mi...
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Amortising Problem July 25th 2012, 01:25 AM #1 Newbie Joined Jul 2012 From australia Posts 7 Amortising Problem Hello Everyone, This is my first post here. I have a hypothetical problem regarding the sale of a house. There are two scenarios involved and I would like to calculate the best outcome ...
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Homework Help Posted by anonymous on Tuesday, July 2, 2013 at 12:58pm. What is the largest integer less than 1000 that can be represented as a^3+b^3+c^3 for some integers a,b,c, such that a+b+c=0. • math - MathMate, Tuesday, July 2, 2013 at 4:39pm By trial and error, I get: 11^3+(-5)^3+(-6)^3=990 If w...
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integer proof help October 17th 2012, 12:40 AM #1 Super Member Joined Sep 2008 Posts 607 integer proof help Prove that there is no integer n such that $\frac{1}{n^{3}-1}+ \frac{1}{n^{3}+1} = \frac{1}{n}$ Can I just say, when n = 1 it it does not work for '1' than it must not work for all other ...
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Math Help May 23rd 2009, 12:11 PM #1 Newbie Joined May 2009 From FL. Posts 2 Calculus What is the equation for the tangent line of a circle with the point on the circle (-1, 2). center of circle (2, -1). i just cant remember the formula. thanks.(worried) Last edited by mr fantastic; March 7th 2...
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urgent help with area of shapes October 26th 2008, 02:47 AM #1 Newbie Joined Oct 2008 Posts 5 urgent help with area of shapes ok, this might sound dumb but i am dyslexic, but basically i have been given the square footage of an area (30000feet) and knowing this i must make a shape out of it, not just a s...
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Momentum and Impulse December 9th 2009, 07:30 PM #1 Junior Member Joined Nov 2009 Posts 29 Momentum and Impulse It may surprise you to learn that the collision of a baseball and bat lasts only about a thousandth of a second. Here we calculate the average force on the bat during this collision by first ...
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Show this matrix is similar to a diagonal matrix August 2nd 2011, 03:46 AM #1 Newbie Joined Mar 2011 Posts 13 Show this matrix is similar to a diagonal matrix A square matrix $A$ (of some size $n \times n$) satisfies the condition $A^2 - 8A +15I = 0.$ (a) Show that this matrix is similar to a diagon...
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Column Space and Row space June 19th 2007, 03:28 PM Carl505 Column Space and Row space I have a n by n matrix in which i have to calculate the orthogonal basis for the column space and row space. I keep getting the same basis for both. Is that supposed to happen when dealing with a square matrix, or am i doi...
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how many ways to make change for 100 dollars? May 8th 2008, 07:47 AM #1 Member Joined Jan 2008 Posts 175 how many ways to make change for 100 dollars? using 10 and 20 dollar bills? its a generating function problem, for the life of me i dont know what to do. The answer is the coefficient of $x...
4
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Jacobian determinant May 6th 2010, 08:15 PM #1 Member Joined May 2008 Posts 77 Jacobian determinant I'm going to rush through most of this stuff, as I feel I've got it correct. It's just the answer to the last question that's bugging me. Question Let R be the region in the xy-plane enclosed by t...
5
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m Greedy is Good By supernova TopCoder Member John Smith is in trouble! He is a TopCoder member and once he learned to master the "Force" of dynamic programming, he began solving problem after problem. But his once obedient computer acts quite unfriendly today. Following his usual morning ritual, John woke up at 10 ...
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the encyclopedic entry of complete metric space In mathematical analysis , a metric space M is said to be complete (or Cauchy ) if every Cauchy sequence of points in M has a limit that is also in M or alternatively if every Cauchy sequence in M converges in M . Intuitively, a space is complete if t...
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Critical Periods of Perturbations of Reversible Rigidly Isochronous Centers Abstract and Applied Analysis Volume 2013 (2013), Article ID 481501, 12 pages http://dx.doi.org/10.1155/2013/481501 Research Article Critical Periods of Perturbations of Reversible Rigidly Isochronous Centers ^1The Institute of Mathematics, ...
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Number of subgroups of an abelian group How many subgroups of order $p^{2}$ does the abelian group $Z_{p^{3}} \oplus Z_{p^{2}}$ have? A subgroup of an abelian group inherits commutativity, and we know the order of the subgroup is $p^2$, so we can apply the fundamental theorem of finitely generated groups to see that t...
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Journal of the Brazilian Society of Mechanical Sciences Services on Demand Article Indicators Related links Share Print version ISSN 0100-7386 J. Braz. Soc. Mech. Sci. vol.22 n.3 Campinas  2000 http://dx.doi.org/10.1590/S0100-73862000000300006  A Modified Contour Error Controller for a High Speed XY Table Held...
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Cyclotomic Fields over Q April 16th 2009, 03:48 PM #1 Member Joined Oct 2008 Posts 130 Cyclotomic Fields over Q Prove that E=Q(2^(1/3)) is not a subfield of any cyclotomic field over Q. First I note that the extension E/Q is not Galois. It has only trivial automorphism group and is an extension of d...
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Oscillation Theorems for Second-Order Forced Neutral Nonlinear Differential Equations with Delayed Argument International Journal of Differential Equations Volume 2010 (2010), Article ID 181784, 15 pages http://dx.doi.org/10.1155/2010/181784 Research Article Oscillation Theorems for Second-Order Forced Neutral Nonlin...
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Geodesics on a torus October 23rd 2011, 06:45 PM #1 Junior Member Joined Sep 2010 Posts 36 Geodesics on a torus Hi All, i have been asked to investigate Geodesics on a Torus and their different properties. Unfortunately I am getting nowhere after trying for 2 hours. I must be missing something cruci...
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Hopf Bifurcation Analysis for a Computer Virus Model with Two Delays Abstract and Applied Analysis Volume 2013 (2013), Article ID 560804, 18 pages http://dx.doi.org/10.1155/2013/560804 Research Article Hopf Bifurcation Analysis for a Computer Virus Model with Two Delays ^1Key Laboratory of Advanced Process Control f...
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Brevet US4884248 - Method of restoring seismic data RELATED APPLICATIONS This application is a continuation-in-part of U.S. patent application Ser. No. 148,307 filed Jan. 25, 1988 pending, and hereby incorporated by reference as if reproduced in its entirety. BACKGROUND OF THE INVENTION This invention relates to sei...
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Wavelet Optimal Estimations for Density Functions under Severely Ill-Posed Noises Abstract and Applied Analysis Volume 2013 (2013), Article ID 260573, 7 pages http://dx.doi.org/10.1155/2013/260573 Research Article Wavelet Optimal Estimations for Density Functions under Severely Ill-Posed Noises Department of Applied...
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A Rotational And Translational Motion Is A Standalone Natural Phenomenon A Rotational and Translational motion is standalone natural phenomenon For this experiment, two identically thin cylinders which are initially static to the observer are taken. These cylinders are attached with internal mechanical springs that in...
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Parametric Question January 21st 2010, 05:19 PM #1 Senior Member Joined Jul 2008 Posts 347 Hi P(2ap, ap^2), Q(2aq,aq^2) and R(2ar,ar^2) are points on the parabola x^2 = 4ay. a) Show that the equation of the normal at P is py+x = 2ap + ap^3. b) Find the coordinates of the point of intersection...
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dansmath - lessons page - basic skills Order of Operations [ top of page ] . . . 8/97 , revised 7/98 To do the operations in the right order, remember PEMDAS, which stands for: Parentheses, Exponents, Multiplication-Division, Addition-Subtraction. Prime Numbers and Factorizations [ top of pag...
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Homework Help Posted by DANIELLE on Thursday, December 21, 2006 at 1:33am. solve by graphing 3x+2y=8 6x+4y=16 You need to graph the 2 equations, and find where they intersect. That is your solution. Somebody is pulling your leg: These are the same lines, there is no solution. I UNDERSTAND i NEED TO FIND WHERE THE...
4
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Urgent and important??! integral inequality December 17th 2006, 10:33 AM #1 Urgent and important??! integral inequality Hi guys, please can someone here help me to prove that: Assume that: $\int_1^{\infty}c(x)^{1/2}<\infty$ this implies that: $\lim_{x \to\infty}{x c(x)^{1/2}}=0$ than...
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Ages Solution The solution: Tim is 3, Jane is 8, and Mary is 15. A little grumbling is in order here, as clue number 1 leads to the situation a year and a half ago, when Tim was 1 1/2, Jane was 6 1/2, and Mary was 13 1/2. This sort of problem is easy if you write down a set of equations. Let t be the year that Tim was...
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Marginal Cost/Demand and Cost November 3rd 2009, 07:53 AM #1 Marginal Cost/Demand and Cost 1. The Marginal Cost of a product is modeled by dC/dx = 4/(x+1)^1/2 When x=15, C=50. Find the Cost function. 2. The demand and cost functions for a product are given by: p=600 -3x C=0.3x^2+6x+600 where ...
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Construction a positive definite covariance matrix Hi. I am trying to simulate two seismic traces $S^1$ and $S^2$ represented as two 1D vectors. I want the correlation between $S^1$ and $S^2$to be a constant i.e. 0.9 and In order to simulate these two trases I am wondering how to make this into a positive d...
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Calculating Entropy using Shannons Formula January 14th 2009, 07:43 AM #1 Newbie Joined Jan 2009 Posts 2 Calculating Entropy using Shannons Formula Hey guys, I am real need of some help here. Basically I have a test tomorrow and the following question was on last years test and its completely over my...
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stuck on this problem September 1st 2008, 09:43 AM DroMan stuck on this problem If a ball is thrown into the air with a velocity of 40ft./s its height in feet t seconds later is given by y=40t-16t^2. a.)Find the average velocity for the time period beginning when t=2 and lasting i.) 0.5 seconds ii.)0.1...
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A Research on a Certain Family of Numbers and Polynomials Related to Stirling Numbers, Central Factorial Numbers, and Euler Numbers Journal of Applied Mathematics Volume 2013 (2013), Article ID 158130, 10 pages http://dx.doi.org/10.1155/2013/158130 Research Article A Research on a Certain Family of Numbers and Polyno...
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Superconductors - Magnetic Susceptibility Determining the Critical Temperature with the Susceptibility Probe The procedure that follows provides a step by step method for determining the critical temperature of the superconductor sample contained within the superconducting susceptibility probe included in the Supercon...
4
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Flow rate March 10th 2007, 06:32 AM #1 Member Joined Mar 2007 From England Posts 104 Flow rate a) At a time t=0 a tank contains one unit of water. Water flows out of the tank at a rate proportional to the amount of water in the tank. The amount of water in the tank at time t is y. Show that there...
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A Comparative Elastohydrostatic Analysis of CFV- and Capillary-Compensated Multirecess Hydrostatic/Hybrid Journal Bearing Operating with Micropolar Lubricant ISRN Tribology Volume 2013 (2013), Article ID 924802, 17 pages http://dx.doi.org/10.5402/2013/924802 Research Article A Comparative Elastohydrostatic Analysis o...
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Trouble with Gamma function September 10th 2012, 02:27 PM #1 Member Joined Jun 2012 From Georgia Posts 175 Thanks 22 Trouble with Gamma function Solve for $\Gamma(-3/2).$ $\Gamma(-3/2) = \frac{1}{2} \cdot \frac{3}{2} \Gamma(1/2)$ $= \frac{4}{3} \int_{0}^\infty t^{1/2} e^{-t} dt$ <-- With...
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prove ? ----- $\sqrt{5+\sqrt{21}}=\sqrt{2+\sqrt{3}}+\sqrt{4-\sqrt{7}}$ $5+\sqrt{21}=(\sqrt{2+\sqrt{3}}+\sqrt{4-\sqrt{7}})^2$ $5+\sqrt{21}=2+\sqrt{3} + 4-\sqrt{7} + 2\sqrt{8 - 2\sqrt{7} + 4\sqrt{3} -\sqrt {21}}$ $2\sqrt{8 - 2\sqrt{7} + 4\sqrt{3} -\sqrt{21}} = \sqrt{21} - \sqrt{3} + \sqrt{7} - 1$ $8 - 2\sqrt{7} + 4\sqrt{...
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Multiplication and Division of Rational Expressions Okay so that was meant to be: 28x+4 over 45x-30, divided by 14x+7 over 30x-20. I wish i knew how to do these off hand the way you do these is the same way you divide by fractions: (a/b) ÷ (c/d) = (a/b)(d/c) = (ad)/(bc) in this case, a = 28x + 4, b = 45x - 30, c = 14...
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Analysis of Scaling Law and Figure of Merit of Fiber-Based Biosensor Journal of Nanomaterials Volume 2012 (2012), Article ID 154736, 7 pages http://dx.doi.org/10.1155/2012/154736 Research Article Analysis of Scaling Law and Figure of Merit of Fiber-Based Biosensor ^1New Vision Inc., Banciao, New Taipei City, Taiwan ...
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Morse-Smale systems From Scholarpedia Michael Shub (2007), Scholarpedia, 2(3):1785. doi:10.4249/scholarpedia.1785 revision #132702 [link to/cite this article] More-Smale systems are the simplest dynamical systems. They are structurally stable and have intimate connections to the topology of manifolds. We elucidate ...
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AC Electricity : RMS Quantities First Part of AC Electricity for Industrial Instrumentation Series It is often useful to be able to express the amplitude of an AC quantity such as voltage or current in terms that are equivalent to direct current (DC). Doing so provides an “apples-to-apples” comparison between AC and...
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Multiobjective Optimization of Evacuation Routes in Stadium Using Superposed Potential Field Network Based ACO Computational Intelligence and Neuroscience Volume 2013 (2013), Article ID 369016, 11 pages http://dx.doi.org/10.1155/2013/369016 Research Article Multiobjective Optimization of Evacuation Routes in Stadium ...
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FMCW Radar for Small Displacement Detection of Vital Signal Using Projection Matrix Method International Journal of Antennas and Propagation Volume 2013 (2013), Article ID 571986, 5 pages http://dx.doi.org/10.1155/2013/571986 Research Article FMCW Radar for Small Displacement Detection of Vital Signal Using Projectio...
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[SOLVED] Difference of two Squares March 24th 2009, 07:00 PM #1 Junior Member Joined Feb 2009 Posts 26 [SOLVED] Difference of two Squares Q.Use the difference of two squares method to factorise: $(y + 4)^2 - (y - 2)^2$ the answer is $12(y + 1)$ but i have absolutely no idea how to work it out. ...
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A Hybrid Genetic Programming Method in Optimization and Forecasting: A Case Study of the Broadband Penetration in OECD Countries Advances in Operations Research Volume 2012 (2012), Article ID 904797, 32 pages http://dx.doi.org/10.1155/2012/904797 Research Article A Hybrid Genetic Programming Method in Optimization an...
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Simple harmonic motion: origin of the formula v^2=w^2(a^2-x^2) July 24th 2009, 07:00 PM ssadi Simple harmonic motion: origin of the formula v^2=w^2(a^2-x^2) I forgot how this formula $v^2=w^2(a^2-x^2)$ comes in the simple harmonic motion. I mean $v^2=w^2 r^2$ but then how do you substitute $(a^2-x^2)$ in place o...
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Eigenvectors and eigenspaces November 2nd 2008, 09:31 AM #1 Member Joined Jul 2008 From Sofia, Bulgaria Posts 75 Eigenvectors and eigenspaces hi there! I´m having some trouble with calculating the eigenvectors for the following matrix: $\left(\begin{array}{ccc}3&2&1\\0&1&2\\0&1&-1\end{array...
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Newton Raphson March 2nd 2009, 07:00 AM #1 Newbie Joined Feb 2009 Posts 11 Newton Raphson Any help with this would be greatly appreciated... I haven't been using maths since I finished high school but have a maths test to do tomorrow as part of an interview. Here is a sample question, and I have no i...
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A Hybrid Analytical-Numerical Model Based on the Method of Fundamental Solutions for the Analysis of Sound Scattering by Buried Shell Structures Mathematical Problems in Engineering Volume 2011 (2011), Article ID 710623, 22 pages http://dx.doi.org/10.1155/2011/710623 Research Article A Hybrid Analytical-Numerical Mod...
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A Characterization for Compact Sets in the Space of Fuzzy Star-Shaped Numbers with Abstract and Applied Analysis Volume 2013 (2013), Article ID 627314, 6 pages http://dx.doi.org/10.1155/2013/627314 Research Article A Characterization for Compact Sets in the Space of Fuzzy Star-Shaped Numbers with Metric ^1School of...
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Determinant of sum of positive definite matrices up vote 14 down vote favorite 4 Say $A$ and $B$ are symmetric, positive definite matrices. I've proved that $\det(A+B) \ge \det(A) + \det(B)$ in the case that $A$ and $B$ are two dimensional. Is this true in general for $n$-dimensional matrices? Is it even true that ...
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How to prove that the multiplication table of two isomorphic groups are the same May 6th 2012, 07:43 AM #1 Newbie Joined May 2012 From Amsterdam, The Netherlands Posts 13 How to prove that the multiplication table of two isomorphic groups are the same Prove: G[1] en G[2] are isomorphic if and onl...
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Need take a look at integration culculus November 18th 2010, 03:57 AM #1 Junior Member Need take a look at integration culculus That is not right: $du=-dx/x^2$. Better use the substitution $t=\ln x$ . Then: $\displaystyle\int_0^e 2^{\ln x}\cdot \dfrac{dx}{x}=\displaystyle\int_0^12^tdt=\ldots$ Could you...
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Inequalities September 10th 2012, 06:58 AM #1 Member Joined Jul 2011 Posts 140 Inequalities Can anyone help me confirm if I have solved this correctly? Many thanks. Q. (1 + 2x)^n > 1 + 2nx, for x > 0 & n $\in \mathbb{N}$ Attempt: Step 1: For n = 1... (1 + 2x)^1 = 1 + 2x '&' 1 + 2(1)x =...
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search results Expand all Collapse all Results 1 - 21 of 21 1. CJM 2013 (vol 65 pp. 740) Regularization of Subsolutions in Discrete Weak KAM Theory We expose different methods of regularizations of subsolutions in the context of discrete weak KAM theory. They allow to prove the existence and the density of $...
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speed, velocity and acceleration January 24th 2013, 06:31 AM #1 Junior Member Joined Sep 2012 From New York Posts 54 hey everyone i recently came across a question which asks for speed and in AB calculus the only thing my teacher taught me was velocity. Can anyone explain to me the difference bet...
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Logical Argument #3...To be valid or not to be May 13th 2011, 08:16 PM #1 Newbie Joined May 2011 Posts 13 Logical Argument #3...To be valid or not to be This will be the last problem for tonight, I don't want to make it appear like I am abusing anyone's help, but I am a step by step learner and this is d...
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MoP Mastery/Block Calculations - Build 15739 MoP Mastery/Block Calculations – Build 15739 Last time, I mused on exactly how Blizzard would implement the mastery scaling on Shield of the Righteous (SotR). This week, build 15739 answered a few of our questions. Divine Bulwark now explicitly increases the damage reductio...
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Innumeracy Revisited The New York Times has an interesting article today examining the curious fact that certain types of terrorist organizations have an unusually high ratio of engineers among their members. An interesting point to study, no doubt, but what caught my eye was this little blunder: William A. Wulf, ...
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Sba: Controle & Automação Sociedade Brasileira de Automatica Servicios Personalizados Articulo Indicadores Links relacionados Compartir versión impresa ISSN 0103-1759 Sba Controle & Automação v.16 n.1 Campinas ene./mar. 2005 http://dx.doi.org/10.1590/S0103-17592005000100003  ...
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linear programming proofs July 19th 2008, 09:26 PM squarerootof2 linear programming proofs i have these two questions that i am having trouble understanding. 1. show that the linear kuhn-tucker theorem implies the complementary slackness conditions. 2. show that if A is a linear transformation and A' i...
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Solar Heat from a Winter's Sun Solar Heat in December by ...
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Every Positive Number Has A Unique Positive Square Root May 2nd 2008, 04:03 AM #1 Newbie Joined May 2008 Posts 1 Every Positive Number Has A Unique Positive Square Root Hello, I am currently studying Introduction to Analysis by Maxwell Rosenlicht. On page 28 -29 he gives this proof for Every Positiv...
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the encyclopedic entry of Joseph Boussinesq In fluid dynamics, the Boussinesq approximation for water waves is an approximation valid for weakly non-linear and fairly long waves. The approximation is named after Joseph Boussinesq, who first derived them in response to the observation by John Scott Russell of the wave o...
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Ingeniare. Revista chilena de ingeniería Servicios Personalizados Articulo Indicadores Links relacionados versión On-line ISSN 0718-3305 Ingeniare. Rev. chil. ing. v.18 n.2 Arica ago. 2010 http://dx.doi.org/10.4067/S0718-33052010000200007  Ingeniare. Revista chilena de ingeniería, vol. 18 Nº 2, 2010, pp. 203-214...
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Estimating unknown parameter exercise. May 14th 2011, 05:14 AM #1 Junior Member Joined Jun 2010 From Skopje Posts 54 Estimating unknown parameter exercise. Hi i started solving exercises for estimating parameters and as i started already i stuck my self with this task: Estimate the unknonw param...
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[ -0.06787109375, -0.036865234375, 0.0218505859375, -0.068359375, -0.03369140625, -0.0211181640625, 0.0634765625, -0.0002460479736328125, 0.035400390625, 0.019775390625, 0.06494140625, -0.08203125, -0.0166015625, -0.01806640625, -0.036865234375, 0.046875, -0.007720947265625, 0.053710...
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Factoring Expression Factor the Expression Completely: 5(x^2+4)^4 (2x)(x-2)^4 + (x^2+4)^5 (4)(x-2)^3 Thanks First take out the common factors of: $5(x^2+4)^4 (2x)(x-2)^4 + (x^2+4)^5 (4)(x-2)^3=(x^2+4)^4(x-2)^3(10x(x-2) + 4(x^2+4))$ Expand the last bracket: $(x^2+4)^4(x-2)^3(10x(x-2) + 4(x^2+4))=<br /> (x^ 2+4)^4(x-2)^...
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[ 0.01123046875, -0.01953125, -0.00787353515625, 0.014404296875, 0.0576171875, 0.038330078125, -0.0267333984375, -0.0037078857421875, -0.0205078125, -0.051025390625, 0.0732421875, -0.031494140625, 0.0546875, 0.035888671875, 0.005340576171875, 0.052734375, -0.0115966796875, -0.0060119...
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