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Mast Kalandar When a sphere (globe or ball) is turned about its centre a number of times, there is at least one point that starts and ends at the same place. This a consequence of the algebraic statment that a 3x3 orthogonal matrix with determinant has 1 as an eigenvector with eigenvalue 1. One of my students recently ...
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finding the equation of the line July 30th 2012, 06:37 AM #1 finding the equation of the line find the equation of the line passing through the point of intersection of the lines x - y = 0 and 3x - 2y = 2 and satisfying the condition indicated: (without finding the intersection of the two lines) a. conta...
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Exponential and Logarithmic Functions help!!! October 24th 2007, 03:52 PM #1 Junior Member Joined Dec 2006 From On Earth. Posts 38 Exponential and Logarithmic Functions help!!! Hi everyone! I am currently having trouble understanding a couple parts of my homework. I filled in the rest but these ...
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Elementary Math Problem March 23rd 2009, 11:36 AM #1 Newbie Joined Feb 2009 Posts 12 How many cubes are in the 10th collection of cubes in this sequence? 1st- 1 cube 2nd- 4 cubes 3rd- 10 cubes..... l l l 10th- ? cubes Any help appreciated! Tetrahedral numbers Hello ...
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Homework Help Posted by fakaapo on Thursday, April 14, 2011 at 8:09am. For the given linear prgramming problem, write down the objective function and the constraints. Kris is trying to make his business more efficient by having a system of both large and small vans. He can spend no more than $100,000 for both type of...
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Finding Pi: Buffon's Needle Method Date: 1/31/96 at 19:45:10 From: Robert Garry Subject: Calculating PI Dr. Math, For my Survey of Math class, the students are calculating the value of PI. They have come up with several methods to do so, and I was hoping to show them a surprising way using a needle and parallel li...
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Real Analysis: Integrals October 28th 2008, 09:28 AM #1 Junior Member Joined May 2008 Posts 70 Real Analysis: Integrals Without evaluating the integral, how does one show that: 0 less than or equal to the integral from 0 to pi/6 sin(x) dx greater than or equal to pi/12? For $x\in [0,\pi/6]$ we h...
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Homework Help Posted by David on Saturday, July 27, 2013 at 4:33pm. Solve the DE by using the Laplace transform: x''+x=cos(3t), x(0)=x'(0)=0 • calculus - Steve, Saturday, July 27, 2013 at 6:03pm L{x"} = s^2*F(s) - s*f(0) - f'(0) = s^2*F(s) so, s^2 F(s) + F(s) = s/(s^2+9) F(s) = s/((s^2+9)(s...
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calculus for areas April 13th 2010, 06:30 AM #1 Member Joined Feb 2010 Posts 93 calculus for areas Hi: I have this question that follows. It is in a differentiation section of the book. It asks to find area and value of x. But I thought when I differentiate it is to find the gradient of a tangent ...
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Calculus Problems Multiple Choice April 19th 2006, 09:08 PM #1 Junior Member Joined Jan 2006 From Oakland Posts 55 22. The base of a solid is the region enclosed by the ellipse 4x^2+y^2=1. If all plane cross sections prependicular to the x-axis are semicircles, the its volume is (A) Pi/3 (B)...
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Two substitution integral evaluation questions February 16th 2009, 11:29 AM #1 Member Joined Oct 2008 Posts 242 Two substitution integral evaluation questions I've attached a picture, there's a few types of problems I'm having trouble with. I can easily solve simple integral problems involving substituti...
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Exponential and Logarithm Equations March 30th 2011, 08:21 PM #1 Junior Member Joined Jul 2010 Posts 25 Exponential and Logarithm Equations Hello everybody, I'm having trouble with this problem. $3*2^x^-^2 = 6-2^x^-^2$ This homework question has me completely stumped, my teacher said that ...
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Nonlinear Oscillations December 29th 2009, 06:09 AM Showcase_22 Nonlinear Oscillations Hi guys! I think I posted a question similar to this before. I think i've made some progress in solving questions of this type, but i'm still getting stuck on bits of it. Quote: Find the general solution to $\ddot{x...
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maximization problem March 4th 2009, 05:18 PM #1 Newbie Joined Mar 2009 Posts 20 maximization problem Please help on this one.... Don't really understand the problem. What they ask me to do. It says.. Solve the following maximization problem: max xy^(1\2) x,y subject to X^...
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Homework Help Posted by Kalen on Thursday, May 17, 2012 at 6:49pm. write y=sinx-cosx in the form y=ksin (x+a), where the measure of a is in radians. answers: sqrt2sin (x+3pi/4), sqrt2sin (x+5pi/4), sqrt2sin (x+pi/4), or sqrt2sin (x+7pi/4) ...? • trig - Reiny, Thursday, May 17, 2012 at 7:03pm ksin(x+a) = k(sinx...
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pseudo inverse of a matrix January 21st 2011, 08:43 PM nadia321 pseudo inverse of a matrix Hi Let A be an $m \times n$ matrix. An $n\times m$ matrix $A{^\oplus}$ is a pseudoinverse of A if there are matrices $U \ and\ V$ such that $AA^{\oplus} A= A,$ $A^{\oplus}=UA^{\oplus}=A^{T}V.$ Show that $A...
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One confusing step in a solution September 15th 2010, 05:03 PM #1 Newbie Joined Aug 2010 Posts 4 One confusing step in a solution Hi, I'm trying to understand the solution to a problem, and I get most of it, but there is one step in the algebra I can't quite follow. Please help! It looks like t...
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integration, area and volume July 11th 2009, 05:34 PM #1 Junior Member Joined Jan 2009 Posts 68 integration, area and volume a) Find the area enclosed between y=1/sqrt(1-x^2), the x axis and the lines x=0 and x=1/2. integrating y I got [sin^-1(x)] between limits 1/2 and 0 which equals =[sin^-1(1...
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Extremal Combinatorics III: Some Basic Theorems Posted on September 28, 2008 by Gil Kalai Shattering Let us return to extremal problems for families of sets and describe several basic theorems and basic open problems. In the next part we will discuss a nice proof technique called “shifting” or “compression.” The Sa...
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Simple fractional equation May 4th 2009, 11:44 AM #1 Newbie Joined May 2009 Posts 2 So here's the equation. Solve: $7 \frac {1}{2}x -\frac {1}{2}x = 3 \frac {3}{4} + 39$ I know x = 12 because of the answer key, but I keep getting the wrong answer. I really need a step-by-step explanation. ...
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the encyclopedic entry of set going In mathematics , a level set of a real -valued function f of n variables is a set of the form { (x[1],...,x[n]) | f(x[1],...,x[n]) = c } where c is a constant. That is, it is the set where the function takes on a given constant value. For example, given a specific ...
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Circulation May 2nd 2009, 11:43 AM Apprentice123 Circulation Calculate the circulation of vector field F arrond $\alpha$ 1) $F(x,y) = (x-y)i + (x+y)j$ and $\alpha$ is the closed polygonal ABCDA traveled once in anticlockwise joining the points $A(1,0)$, $B(1,2)$, $C(0,2)$ and $D(0,1)$. My solution: ...
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direct proof or contraposition? June 24th 2007, 12:25 PM Discrete direct proof or contraposition? I am asked to proof this conjecture: If x is rational and x is not equal to 0, then 1/x is rational. How do I proof this? Should I use direct or contraposition proof? I just learned about this stuff and I don't...
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Derivate of implicit function December 16th 2009, 07:02 AM #1 Junior Member Joined Nov 2009 Posts 29 Derivate of implicit function Hy. I have question how can i make derivate from implicit function i have lost at the begining. parameters of this function are $a=7;\ b=5;\ c=3;\ d=-7;\ e=-5;...
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Navy Electricity and Electronics Training Series (NEETS) NEETS Module 9 — Introduction to Wave- Generation and Wave-Shaping Pages i - ix , 1-1 to 1-10 , 1-11 to 1-20 , 1-21 to 1-30 , 1-31 to 1-40 , 1-41 to 1-52 , 2-1 to 2-10 , 2-11 to 2-20 , 2-21 to 2-30 , 2-31 to 2-38 , 3-1 to 3-10 , 3-11 to 3-...
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double integrals in polar coordinates December 8th 2010, 08:26 PM #1 Newbie Joined Dec 2010 From Tennessee Posts 4 double integrals in polar coordinates I have to use a double integral in polar coordinates to find the area of the region inside the circle x^2 + y^2 = 4 and to the right of the line x =...
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finite-dimensional subspaces May 12th 2008, 07:12 AM #1 Newbie Joined May 2008 Posts 11 finite-dimensional subspaces Hi, Have been trying to understand linear Algebra for a month now. Am unable to solve this: If U,V,W are finite-dimensional subspaces of a real vector space, show that dim U + ...
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Inverse Laplace October 15th 2009, 07:48 AM Chris0724 Inverse Laplace hi, Inverse laplace ---(s + 9 ) ------------ s^2 + 6s+ 9 -----(s + 3 ) --------------- + ......... (s + 3 )^ 2 + 4 { e^-3t } * Inverse laplace { s / (s+4) } + ....... I have problem understand this st...
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Problem 15 January 15th 2007, 05:35 PM #1 Global Moderator Joined Nov 2005 From New York City Posts 10,616 Thanks 9 Problem 15 Behold! A plain simple isoseles triangle appears besides you. Frozen in a white boring background this triangle is full of supprises. You must locate the angle by the red...
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math college algebra Posted by Nicole on Monday, January 23, 2012 at 12:46pm. write the quadratic function f(x)-x^2+14x-50 in the form f(x)=a(x-h)^2+k by completing the square and graph • math college algebra - Reiny, Monday, January 23, 2012 at 12:59pm I don't know if that is f(x) = - x^2 ... or f...
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Backward Euler Method May 23rd 2009, 10:04 AM damaged69 Backward Euler Method Hi, Can someone please tell me how to use the Backward Euler Method (BEM) manually like the step by step process for the equation, in determining it with a step size of say 0.1 to find the y1 when the inital value of y0 = 2: ...
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Four segments, find angle? December 22nd 2007, 07:36 AM sjcomp Four segments, find angle? Given the geometry shown below I need to find angle r. I now all the sides (a,b,c,d). I do NOT know what angle K is. Here is the geometry setup: http://img443.imageshack.us/img443/4301/geomml7.png I approached this...
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showing two distribution functions identical June 11th 2011, 10:35 PM #1 showing two distribution functions identical Let $X_1,X_2$ be two i.i.d. $Exp(\lambda)$ random variables and $R$ is a $Ber(\frac{1}{2})$ variable. How to show that the distribution functions of $X_1-X_2$ and $RX_1-(1-R)X_2$ are identical? ...
5
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Poisson Process Question November 16th 2008, 03:58 PM #1 Poisson Process Question Assume that you perform and experiment where the outcomes occur according to a Poisson Process with rate 4 per minute, and that the experiment is complete once you observe 250 outcomes. Calculate the mean time and variance time ...
5
[ 0.061279296875, 0.01904296875, 0.0186767578125, -0.07177734375, -0.08447265625, -0.044921875, -0.00567626953125, -0.017822265625, 0.0927734375, 0.01031494140625, 0.023681640625, 0.0167236328125, 0.00982666015625, 0.049072265625, -0.017578125, 0.0166015625, 0.051513671875, -0.048339...
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word problem - quadratics July 12th 2008, 03:04 PM #1 Newbie Joined Jul 2008 Posts 12 word problem - quadratics Aaaalright, apparently I'm supposed to solve this using the quadratic formula (ps: you dont have to run through the steps of the formula with me, i'm good with that part) Here is the word ...
4
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Bound of error(Lagrange Interpolation) June 15th 2009, 02:10 AM #1 Bound of error(Lagrange Interpolation) Hello everybody Given the Lagrange polynomial with the table: $\begin{tabular} {|c|c|c|c|}<br /> \hline<br /> x & 8.3 & 8.6 & 8.7 \\<br /> \hline<br /> f(x) & 17.56492 & 18.50515 & 18.32091 \\<br />...
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Homework Help Posted by Edward on Friday, October 18, 2013 at 3:14pm. A street light is mounted at the top of a 19-ft-tall pole. A man 5.5 feet tall walks away from the pole with a speed of 14 ft/s along a straight path. How fast is the tip of his shadow moving when he is 100 feet from the pole? • math - Steve, Fri...
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Homework Help Posted by Anonymous on Thursday, December 8, 2011 at 9:49pm. In circle O, diameter RS has endpoints R(3a,2b-1) and S(a-6,4b+5). Find the coordinates of point O in terms of a and b. Express your answer in simplest form. • Geometry - Steve, Thursday, December 8, 2011 at 11:06pm we know that the end...
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Math Help April 17th 2009, 01:51 PM #1 trig id Hey all, I was wondering if someone can walk me through this one: [cot^2(B) - cos^2(B)]/[csc^2(B) -1] My solution is as follows: [cot^2(B)/-sec^2(B)] - cos^2(B)/-sec^2(B) -cos^4(B)/sin^2(B) +1 and now i am a bit stuck. the correct answer is c...
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How is this reduced ech form? December 4th 2011, 03:35 AM #1 Member Joined Nov 2009 Posts 171 How is this reduced ech form? 1 1 0 l 9 0 1 1 l 7 0 0 0 l 0 Basically this is in a problem that says use Gauss jordan elination to solve the following system: x1 + x2 = 9 x2 + x3 = 7 2x...
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Interior/Closure May 4th 2009, 03:13 PM #1 Interior/Closure Is this correct? Prove that $\overline{A} = X\setminus int(X\setminus A)$ Is it equivalent to prove that $X\setminus\overline{A} = int(X\setminus A)?$ If so then heres my proof... Let $x \in X$\ $\overline{A}$, then $B(x,r) \cap X$\ $...
5
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Demand Equation; Domain November 4th 2012, 12:00 PM #1 Newbie Joined Nov 2012 From United States Posts 1 Demand Equation; Domain The price, p and the quantity x sold of a certain product ovey the demand equation x=10000 - 200p A: Find a model that expresses the revenue R as a function of p ...
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Stream Cryptosystems The Blum-Blum-Shub (BBS) pseudorandom bit generator. See the original paper by Blum, Blum and Shub [BlumBlumShub1986]. The BBS algorithm is also discussed in section 5.5.2 of [MenezesEtAl1996]. INPUT: □ length – positive integer; the number of bits in the output pseudorandom bi...
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open and closed sets October 26th 2009, 06:57 AM #1 Junior Member Joined Oct 2009 Posts 26 open and closed sets In this problem you will prove that the only subsets of R that are both open and closed are R and the empty set. Let E be a nonempty subset of R, and assume that E is both open and closed. Sinc...
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cauchy-sequenze November 10th 2008, 07:29 AM Rapha cauchy-sequenze Hello It is $<u,v> = \int^2_0 \overline{u}(x) v(x) dx \ \ \forall u,v \in C[0,2]$ (defines a dot product) Show that $f_n$ is a cauchy-sequenze (field) norm: $||u||_2 = \sqrt{<u, u>} \ \ \forall u \in C[0,2]$ $f_n(x)=\begin{case...
5
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algebra 2 help please would appreciate Posted by lisa on Saturday, November 9, 2013 at 9:45am. 3+(2x/x+4) divide x/x+4 please simplify the complex fraction thank you show work • algebra 2 help please would appreciate - Bosnian, Saturday, November 9, 2013 at 9:54am 2 x / x = 2 x / x = 1 [ 3 + ( 2 x ...
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Two-Dimensional Einstein Manifolds in Geometrothermodynamics Advances in High Energy Physics Volume 2013 (2013), Article ID 967618, 6 pages http://dx.doi.org/10.1155/2013/967618 Research Article Two-Dimensional Einstein Manifolds in Geometrothermodynamics ^1Instituto de Ciencias Nucleares, Universidad Nacional Autón...
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Help with reduction formula February 2nd 2008, 02:03 PM #1 Newbie Joined Feb 2008 Posts 3 Help with reduction formula Hi, i want to have a reduction formula for this problem i hope that you can help me with this J[k] = int((x^2-121)^k, x = 0 .. 11) thanks in advance Assuming you're familiar...
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How many different languages? August 21st 2011, 02:00 AM #1 How many different languages? A company specializing in international trade has 70 employees. For any two employees A and B, there is a language that A speaks but B does not, and also a language that B speaks but A does not. At least how many differe...
5
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A Diameter problem (7): The Best Known Bound Posted on December 1, 2008 by Gil Kalai   Our Diameter problem for families of sets Consider a family $\cal F$ of subsets of size d of the set N={1,2,…,n}. Associate to $\cal F$ a graph $G({\cal F})$ as follows: The vertices of  $G({\cal F})$ are simply the sets in $\ca...
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Linear difference equations March 30th 2009, 09:01 AM #1 Newbie Joined Jan 2009 Posts 11 Linear difference equations there are two questions in the attachment with the correct answers. i have worked through the questions, to my knowledge, however seem to be only a few steps short of reaching the act...
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scipy.signal.welch scipy.signal.welch¶ scipy.signal.welch(x, fs=1.0, window='hanning', nperseg=256, noverlap=None, nfft=None, detrend='constant', return_onesided=True, scaling='density', axis=-1)[source]¶ Estimate power spectral density using Welch’s method. Welch’s method [R145] computes an estimate of the ...
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Homework Help Posted by Sahana E. on Thursday, September 29, 2011 at 5:32pm. Determine the coordinates of the endpoint of a segment CE with one endpoint at C(3,10) and a midpoint at (-1,-6). Disclaimer: This is 10th grade geometry. • Math - Steve, Thursday, September 29, 2011 at 5:52pm The midpoint is halfway...
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Percentage and ratio using integers help May 1st 2013, 01:54 AM #1 Newbie Joined May 2013 From Wales Posts 3 Percentage and ratio using integers help Currently studying mathematics for engineers third edition given i havnt done maths for about 9 years its not going to bad but im stuck on theses quest...
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Implicit equation issue.. August 10th 2009, 08:23 AM #1 Member Joined Nov 2007 Posts 100 Implicit equation issue.. 4. Differentiate the implicit equation of the hyperbola 4x^2 - 3y^2 = 24 to find the equation of the normal at the point (3, -2). Find the y-coordinate of the point where the normal meets th...
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vector space proofs October 18th 2009, 03:21 AM #1 Newbie Joined Oct 2009 Posts 2 vector space proofs I'm taking a linear algebra course and I haven't needed to do proofs before this class (I'm an EE major and we take "special" math for Calc and Diff Eq). I could really use some help on the proofs fo...
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Calculation for Richmond County, NC 4-Bedroom Rent Calculation for Richmond County, NC The 4-Bedroom FMR is computed from a 2000 Census Base 4-Bedroom Rent and updated using the same update factors derived for the 2-Bedroom FMR. The 4-Bedroom FMR may be separately rebenchmarked from the 2-Bedroom FMR by a special RDD...
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Calculating Margin of Error Probability November 18th 2008, 09:19 PM #1 Junior Member Joined Jul 2008 Posts 51 Calculating Margin of Error Probability Here is the question: The monthly expenditures on food by single adults in Missoula are normally distributed with a mean of $410 and a SD of $70. Wha...
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Identifying equation type... February 11th 2010, 08:03 AM #1 Member Joined Sep 2009 Posts 82 Identifying equation type... Hi, I need help identifying what type of differential equation the following are. Once I know the type, I'll be able to solve them. Also, if the equations are not exact as given, we a...
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Random Walks Random Walks and Heaps of Cycles Philippe Marchal Département de mathématiques et applications, École normale supérieure (France) ...
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Brazilian Journal of Physics Services on Demand Article Indicators Related links Share Print version ISSN 0103-9733 Braz. J. Phys. vol.39 no.4 São Paulo Dec. 2009 http://dx.doi.org/10.1590/S0103-97332009000600016  Heisenberg spin textures on a cylinder with topological defects L.A.N. de Paula^* Department of ...
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Need Help With Hypothesis Test March 28th 2011, 09:28 AM #1 Newbie Joined Dec 2009 Posts 5 Need Help With Hypothesis Test Let's just say it's been a while since college, and I can't remember everything about hypothesis testing, and now I'm faced with a situation at work where I need to refresh some of th...
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cartesian product proofs October 29th 2009, 09:45 AM #1 Member Joined Mar 2009 Posts 84 cartesian product proofs A X (B U C)= (A X B) U (A X C) proof: Assume (x,y) is an element of A X (B U C). This means x is an element of A and y is an element of B or y is an element of C. Since (x,y) can be x...
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Cohomology of twisted holomorphic forms on Fano threefolds up vote 5 down vote favorite 1 Given a Fano threefold $X$, its index $ind(X)$ is the largest integer $r$ such that there exists a divisor $H$ such that $rH \cong -K_X$. Let $\mathcal{L}$ be the associated (ample) line bundle and define the twisted forms $\Omeg...
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Another Unif. Cont. February 2nd 2010, 06:18 AM #1 Newbie Joined Jan 2010 Posts 10 Another Unif. Cont. Prove or disprove (by counterex.) $f(x) = xlog(\frac{1}{x})$ is unif. cont. on (0,1) and prove or disprove $f(x) = \frac{cosx}{mx+b}$ is unif. cont. on (0,1) for all nonzer0 $m,b \in \mathbb{R}$ So...
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Applications of series and sequences (Superannuation, repayments) July 26th 2008, 10:30 PM Misa-Campo Applications of series and sequences (Superannuation, repayments) Question: At the beginning of each year, Sarah will deposit $1000 in a fund paying 10% each year compound interest: i) What will be the valu...
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Is my math correct? Posted by Henri on Monday, April 20, 2009 at 5:09am. Find the Inside diameter(d) and outside diameter(D) of a hollow shaft given: Power transmitted by shaft=1400kW Shaft speed=45 RPM Angle of twist on shaft=1 degree Shaft lenght(L)=25D Assume d=0.6D Modulus of Rigidity(G)=81.75GPa My answer:...
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De Moivre's Theorem August 19th 2012, 07:53 PM ok59 [Solved] De Moivre's Theorem Please help me solve this problem. if a=cos2alpha + isin2alpha b=cos2beta + isin2beta prove that, a-b / a+b = itan (alpha-beta) August 19th 2012, 08:15 PM richard1234 Re: De Moivre's Theorem Assuming "2alph...
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how do you find row echelon form using TI calc? First, write it in matrix format using the coefficients. $\left[\begin{array}{ccc|c}1&5&6&10\\3&15&-2&9\\5&12&-9&5\end{array}\right]$ The idea is to use elementary row operations to hammer it into the form: $\left[\begin{array}{ccc|c}1&0&0&a\\0&1&0&b\\0...
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Homework Help Posted by No Name on Thursday, November 17, 2011 at 12:58pm. Determine an appropriate linear approximation of the function f(x)= the square root of x and use it to approximate the square root of 24.2. Write your answer in decimal form • calculus - bobpursley, Thursday, November 17, 2011 at 1:25pm ...
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Chaotic quadratic maps Fig.1 illustrates stretching and folding transformations for the quadratic maps f[c] (for example the Myrberg-Feigenbaum point c = -1.401155 is chosen). The segment I[c] = [-x[2 ], x[2]] is mapped into itself (here x[2] = 1/2 + (1/4 - c)^1/2 is the right repelling fixed point). Points outside ...
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Discrete Math Posted by Martin on Tuesday, November 1, 2011 at 11:54am. How many ways can you get a bunch of 4 books to give a friend if you have 30 books (15 novels, 10 history book and 5 math books)? • Discrete Math - MathMate, Tuesday, November 1, 2011 at 4:41pm Without any constraints, you have 30 to choos...
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IWillTry.org Purpose The purpose of this experiment is to determine your vehicle’s drag coefficient Cd and coefficient of rolling resistance Crr. This is done by measuring your vehicle’s speed as a function of time while coasting in neutral (also known as a coast down test). Why would you want to know Cd and Crr for ...
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trapezoid Cut off thetwo right triangles of the trapezium (see attachment) Then you know (A) $\dfrac hx=\tan(72^\circ)$ ........ and ........ (B) $\dfrac hy = \tan(68^\circ)$ According to my sketch you can see that $x+y=8~\implies~y=8-x$ Solve the equations (A) and (B) for h and substitute (8-x) instead of y: $x\tan(72...
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Some sort of geometric distribution with no replacement. May 29th 2010, 10:34 AM zh305 Some sort of geometric distribution with no replacement. Can any one help with the following problem please: There are 237 snake in a pit, a head and a tail are chosen at random and the head made to bite the tail. If the ...
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Homework Help Posted by Denise on Sunday, July 24, 2011 at 5:28pm. Find all solutions in the interval [0, pi], 2sec^2x+tan^2x-3=0 • pre cal 2 - Reiny, Sunday, July 24, 2011 at 6:26pm 2sec^2x+tan^2x-3=0 2/cos^2x + sin^2x/cos^2x - 3 = 0 multiply by cos^2x 2 + sin^2x - 3cos^2x = 0 2 + (1 - cos^2x)...
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Brazilian Journal of Chemical Engineering Services on Demand Article Indicators Related links Share Print version ISSN 0104-6632 Braz. J. Chem. Eng. vol.29 no.3 São Paulo July/Sept. 2012 http://dx.doi.org/10.1590/S0104-66322012000300020  ...
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'Work' Word Problems Made Easy Author Message TAGS: rrsnathan Manager Re: 'Work' Word Problems Made Easy [#permalink] 11 Aug 2013, 00:09 Joined: 30 May 2013 Hi, Posts: 192 ...
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Homework Help Posted by Julia on Wednesday, March 6, 2013 at 10:27pm. how do I solve for 16x^2+56x-120 • algebra I - Bosnian, Wednesday, March 6, 2013 at 10:34pm In google type: quadratic equation online When you see list of results click on: Free Online Quadratic Equation Solver:Solve by Quadrat...
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Math Graphing Posted by Amy~ on Sunday, September 26, 2010 at 1:14am. x^3 < 3x^2 would become x(x^2-3x) then how would I graph this? • Math Graphing - Reiny, Sunday, September 26, 2010 at 7:19am x(x^2-3x) < 0 x^2(x-3) < 0 critical values of x=0 , x=3 on a number line, mark x=0 and x=3, splittin...
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Finding the derivative using the limit defintion. January 18th 2010, 10:05 AM #1 Junior Member Joined Nov 2009 Posts 50 Finding the derivative using the limit defintion. Can you help me with this please: Using delta/epsilon methods show from definitions that if f(x)= x^3-3x+6 then f`(2)=9. Than...
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Agent based modeling From Scholarpedia Filippo Castiglione (2006), Scholarpedia, 1(10):1562. doi:10.4249/scholarpedia.1562 revision #123888 [link to/cite this article] Agent-Based Modeling (ABM), a relatively new computational modeling paradigm, is the modeling of phenomena as dynamical systems of interacting agent...
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Check this proof on supremums? May 5th 2013, 07:53 AM #1 Member Joined Apr 2010 Posts 116 Thanks 1 Check this proof on supremums? This is from Fitzpatrick's Advanced Calculus. I am not very experienced with proofs so could someone tell me if this is a correct way of doing it? Thanks! Claim: If ...
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Homework Help Posted by Son on Wednesday, December 7, 2011 at 11:21pm. Find the point on the graph of the function closest to the given point. Function f(x) = xsquared Point (2, 1/2) • math - Steve, Thursday, December 8, 2011 at 11:54am using distance from (2,1/2) to y=x^2, d^2 = (x-2)^2 + (y-1/2)^2 =...
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conditional expectations September 30th 2009, 10:38 PM #1 Junior Member Joined Apr 2009 Posts 58 conditional expectations Hi, can someone please explain to me how they got the answer to this Question: Find E(X|Y) and E[X - E(X|Y)]^2. Let $\left(\begin{array}{cc}X\\Y\end{array}\right)$ ~ $N( \lef...
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Sketching graphs August 20th 2009, 12:07 AM #1 Senior Member Joined Jul 2008 Posts 347 Hi guys I've been doing revision for yearlies and I've been having difficulties figuring out these questions: 1) Sketch the graph of the periodic function such that f(x) = x for – 1 < x ≤ 1 where the period of...
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Chemical Equilibrium Examples II Technical Tutoring Home · Site Index · Advanced Books · Speed Arithmetic · Math Index · Algebra Index · Calculus Index · Trig Index · Chemistry Index · Gift Shop · Harry Potter DVDs, Videos, Books, Audio CDs and Cassettes · Lord of the Rings DVDs, Videos, Books, Audio CDs and Cassett...
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GCSE Maths The 'nth' term is a formula with 'n' in it which enables you to find any term of a sequence without having to go up from one term to the next. 'n' stands for the term number so to find the 50th term we would just substitute 50 in the formula in place of 'n'. There are two types of sequences that you will ...
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Details Hewlett-Packard HP-41C Datasheet legend Ab/c: Fractions calculation AC: Alternating current BaseN: Number base calculations Card: Magnetic card storage Cmem: Continuo...
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Derivative of a Vector Proof June 4th 2010, 07:02 PM #1 Junior Member Joined Apr 2010 From Riverside, CA Posts 58 Derivative of a Vector Proof f(t) = real-valued function u(t) = vector I need help to prove the following: d/dt [f(t)u(t)] = f'(t)u(t) + f(t)u'(t) I know this is proba...
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Pre-test 6 help #6. Condense the expression to the logarithmic of a single quanity. [2log 5 (x+4)+7log 5 (x+7)]-1/2log 5 x Hello Brooke: Use the properties of logs. log(a)+log(b)=log(ab)...[1] log(a)-log(b)=log(a/ b)...[2] Rewrite as: $log_{5}(x+4)^{2}+log_{5}(x+7)^{7}-log_{5}x^{\frac{1}{2}}$ Using [1] $log_{5}((x+4)^{...
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Square Root July 18th 2008, 05:45 AM #1 MHF Contributor Joined Jul 2008 From NYC Posts 1,489 Square Root Why is the answer to a square root problem always positive and negative? SAMPLE: sqrt{16} = -4 and +4 Why two answers? Because $(-4)^{2}=16$ and $4^{2}=16$ They both lead ...
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Homework Help Posted by Andy G on Tuesday, January 14, 2014 at 9:15pm. ball thrown vertically upward with an initial velocity of 80 ft per second. The distance s(in ft) of the ball from the ground after t seconds is s=80t-16t^2. a. draw the illustration. b. for what time interval is ball more than 96 ft above ground...
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probability distribution ... May 25th 2007, 04:45 AM #1 Member Joined Jul 2006 Posts 95 probability distribution ... Hello, I face some problem in this question plz try to solve that. Thanks . Question: Suppose is a random variable best described by a probability distribution given as:f(...
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estimating lattice sums of concave functions up vote 2 down vote favorite Suppose that $f$ is a twice-differentiable concave function from $R^2$ to $R$ that's negative outside of some bounded set (e.g. $f(x,y)=1-x^2-y^2$) and let $F=$max$(f,0)$. Let $S_n$ be the Riemann sum for the integral of $F$ over $R^2$ obtained ...
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Stochastic Models to Generate Geospatial-, Temporal-, and Cross-Correlated Daily Maximum and Minimum Temperatures Advances in Meteorology Volume 2014 (2014), Article ID 365362, 14 pages http://dx.doi.org/10.1155/2014/365362 Research Article Stochastic Models to Generate Geospatial-, Temporal-, and Cross-Correlated Da...
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differential equations help y''-2.5y'=9.81 I can't seem to be able to solve this. Any help would be awesome. This is a second order equation with constant linear coefficients. We have a method to use to solve problems of these types, where we assume the solution to our equation follows some form (your book should list...
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Homework Help Posted by Sophia on Sunday, January 25, 2009 at 9:40pm. An airplane traveling 1001 m above the ocean at 125km/h is going to drop a box of supplies to shipwrecked victims below. What is the horizontal distance between the plane and the victims when the box is dropped? • physics - Sophia, Sunday, Januar...
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Cardinal numbers proof January 22nd 2008, 09:23 AM #1 Newbie Joined Jan 2008 Posts 6 Cardinal numbers proof How can I prove these lines: Let N be a set of natural numbers and |N|=Xo. How can i prove that Xo + k = Xo or Xo * Xo = Xo Help anyone? i assume $k$ is a cardinal nu...
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Pigeonhole problem January 15th 2013, 10:51 PM #1 Newbie Joined Jan 2013 From germany Posts 1 Pigeonhole problem I'm struggling with this problem for a while now, and I just can't figure it out. Prove: Let $n_1, n_2, . . . , n_t \in N^+$ . If $n_1 + n_2 + . . . + n_t-t + 1$ Objects are laid ...
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