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PhysicsForums Elementary Linear Algebra (matrix)  
19:41 10-Sep-07   [Replies: 1, Views: 41]    By: Unnamed
1. The problem statement, all variables and given/known data Determine the reduced row echolon form of | cos(x) sin(x) | | -sin(x) cos(x) | 2. Relevant equations you can interchange any t...
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PhysicsForums Cauchy summation in maple  
17:27 10-Sep-07   [Replies: 1, Views: 26]    By: Unnamed
So... I want to find the Cauchy sum of the Taylor polynomial of LaTeX Source CodeThe following code was used to generate this LaTeX image:[tex]\\exp x \\sin x[/tex]LaTeX code reference [javascript:...
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PhysicsForums Concept question--exponential function derivatives (calc II)  
17:07 10-Sep-07   [Replies: 3, Views: 42]    By: Unnamed
Ok, so there is an example on my textbook that asks for the derivative of y = x^2. --after applying ln on both sides, if finally gets to the lny = xlnx step. But after this step, it just states ...
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PhysicsForums Symmetric Matrice Proof  
16:57 10-Sep-07   [Replies: 4, Views: 35]    By: Unnamed
1. The problem statement, all variables and given/known data Suppose H is an n by n real symmetric matrix. v is a real column n-vector and H^(k+1)v = 0. Prove that Hv = 0 3. The attempt at a sol...
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PhysicsForums [tex]\frac{1}{2} (x')^2 + \frac{1}{x} = C[/tex]  
16:37 10-Sep-07   [Replies: 1, Views: 41]    By: Unnamed
1. The problem statement, all variables and given/known data The problem occurred when solving LaTeX Source CodeThe following code was used to generate this LaTeX image:[tex] xsingle-quotesingle-qu...
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PhysicsForums Can anyone solved  
13:35 10-Sep-07   [Replies: 9, Views: 88]    By: Unnamed
So this is the basic rules: Y=C+S S=sY s= S/Y= ΔS/ΔY , v= K/Y or Y= K/v I= ΔK From this show that: ΔC/C = s/v Y,S,C, I, K represent income, consumption, savings, caipt...
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PhysicsForums Set Theory Problem  
13:24 10-Sep-07   [Replies: 11, Views: 112]    By: Unnamed
1. The problem statement, all variables and given/known data THIS PROBLEM IS DRIVING ME INSANE!!!!!!!! HELP!!!!!!!!!!!!!!!! Let M be a metric space in which the closure of every open set is open. Pr...
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PhysicsForums x'' - 1/x^2 =0  
12:17 10-Sep-07   [Replies: 18, Views: 141]    By: Unnamed
Can anybody solve this problem? I don't think this is something that we see in an elementary diff eq textbook. Thank you in advance. Yang...
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PhysicsForums Simple series problem  
11:14 10-Sep-07   [Replies: 0, Views: 31]    By: Unnamed
Find LaTeX Source CodeThe following code was used to generate this LaTeX image:[tex] \\mu_1 ^single-quote \\mobx{ and } \\mu_2^single-quote \\\\[/tex]LaTeX code reference [javascript:;]>');"> the firs...
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PhysicsForums Using the Delta-epsilon definition but for two variables?  
10:18 10-Sep-07   [Replies: 3, Views: 65]    By: Unnamed
I have probably over thought the whole thing... but I can't seem to find any place to start with this one: Using the formal definition of a limit: f(x,y)= y / (x^2 + 1) e=0.05...
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PhysicsForums Integration of a composite square root function, easy (hard for me :( )  
06:06 10-Sep-07   [Replies: 15, Views: 156]    By: Unnamed
1. The problem statement, all variables and given/known data How would I integrate: LaTeX Source CodeThe following code was used to generate this LaTeX image:[tex]y = \\sqrt{(1 + 4x^2)}[/tex]LaTeX...
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PhysicsForums How do I graph (In TI-89 titanium) where Y is the independent Variable?  
03:31 10-Sep-07   [Replies: 8, Views: 111]    By: Unnamed
Right now I'm doing Centroids in my math class. we are given two functions. X=-y and X=2y-y^2. My question is, how do I graph these two functions on my TI-89 titanium. The Y=editor is displa...
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PhysicsForums Indefinite Integral  
03:23 10-Sep-07   [Replies: 7, Views: 95]    By: Unnamed
1. The problem statement, all variables and given/known data How is this function continuous from 0 to infinity F(x) = LaTeX Source CodeThe following code was used to generate this LaTeX image:[...
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PhysicsForums Need help with this super brain teaser  
03:15 10-Sep-07   [Replies: 2, Views: 75]    By: Unnamed
I can be rather obsessive about finding answers to brain teasers. Most brain teasers I can solve with some reasoning, no problem. This one though, I have thought and thought about, and can't come to a...
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PhysicsForums One more derivative problem  
03:12 10-Sep-07   [Replies: 10, Views: 82]    By: Unnamed
This is an example I found online. I know how to get to this: , but why is 3-4x brought into the problem? sorry for the newbie questions tonight but my notes from class don't really cover the mat...
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PhysicsForums Logical Proof  
01:34 10-Sep-07   [Replies: 5, Views: 77]    By: Unnamed
Prove x <=> y is logically equivalent to (x-->y) ^ ((~x)-->(~y))....
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PhysicsForums Solve this Proof  
01:24 10-Sep-07   [Replies: 2, Views: 67]    By: Unnamed
suppose a, b, c, and d are integers. prove that if a/c and c/d, then (ac/bd)...
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PhysicsForums x^x. this is a weird one  
01:13 10-Sep-07   [Replies: 6, Views: 150]    By: Unnamed
I wrote my own graphing software, and I thought it had a bug in it, because when I graphed x^x, the curve starts out at (1,1), dips down a little, then rises again to pass through (1,1) as expected, b...
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PhysicsForums number question  
01:11 10-Sep-07   [Replies: 3, Views: 54]    By: Unnamed
when you take a number n=2,3,4,5,6,7,8,or 9 and multiply by 2 then mulitply the product again by two and so on. Then add the individual digits. You get interesting patterns for each number 2-9. wel...
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PhysicsForums Elliptic line integral  
01:07 10-Sep-07   [Replies: 3, Views: 55]    By: Unnamed
1. The problem statement, all variables and given/known data Let C be the ellipse with center (0,0), major axis of length 2a, and minor axis of length 2b. Evaluate LaTeX Source CodeThe following code...
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PhysicsForums Continuity of a function  
01:00 10-Sep-07   [Replies: 4, Views: 54]    By: Unnamed
My problem is this. Let LaTeX Source CodeThe following code was used to generate this LaTeX image:[tex]f:\\mathbb{R}^{2}\\longrightarrow \\mathbb{R}^{2}[/tex]LaTeX code reference [javascript:;]>');"> ...
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PhysicsForums Materials Science & Engineering  
00:22 10-Sep-07   [Replies: 0, Views: 27]    By: Unnamed
MSE 209 Materials Science and Engineering, University of Virginia http://www.virginia.edu/bohr/mse209/class.htm [http://www.virginia.edu/bohr/mse209/class.htm]> Chapter 1. Introduction Chapter ...
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PhysicsForums Help with universal theorem of coefficients for homology  
23:57 9-Sep-07   [Replies: 1, Views: 57]    By: Unnamed
*note before reading: pretend that the superscripts are really subscripts, for some reason , Latex is making the subscripts into superscripts* I'm not sure if I'm interpreting the universal coeffic...
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PhysicsForums proving a function is differetiable in R  
23:30 9-Sep-07   [Replies: 1, Views: 44]    By: Unnamed
f(x) is a function with... LaTeX Source CodeThe following code was used to generate this LaTeX image:[tex]| f(x) - f(y) | \\leq |x-y|^2 \\forall x,y \\in \\Re [/tex]LaTeX code reference [javascript...
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PhysicsForums structure R^k and midpoints of vectors (rudin's PMA chapter 1 problem ..  
23:19 9-Sep-07   [Replies: 0, Views: 35]    By: Unnamed
First this is NOT a homework problem. I am undertaking a self-study of mathematical analysis by following Rudin's Principles of Mathematical analysis. I have done a course in analysis before but this ...
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