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Common math questions, quality answers.
Jul24-14 10:02 AM Greg Bernhardt 
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Test your skills. Math challenges will be posted at least once a week. Suggestions for problems are welcomed. Brought to you by Office_Shredder.
T 12:54 PM pasmith 
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Jan16-12 Greg Bernhardt
Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:23 AM
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I found S(4,5,15) do not exist. some one had found? Donald L. Kreher and Stanis raw p. radziszowski have an algorlthm...
Jul16-09 07:34 AM
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I am trying to solve a real-life design issue involving balance points. It's been a very long time since I've taken...
Jul16-09 06:22 AM
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I think I actually saw this question on here before but cant find it, hopefully someone can help me. We know x=2 for...
Jul16-09 03:52 AM
7 1,082
Dear All, following up on my previous posting "The Riemann Hypothesis for High School Students" here are some further...
Jul15-09 06:59 AM
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I was trying to visualize/understand what y=(-1)x would look like since my graphing calculator won't graph it because...
Jul15-09 03:21 AM
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Since prime colors cannot be created by any combination of any other colors, and since composite colors are...
Jul15-09 02:50 AM
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I am doing a calculation involving taking three or more temperature measurements and then plotting them against...
Jul14-09 07:38 PM
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Hello, What negative derivative means like this one: \frac{\partial^{-1}}{\partial\,x^{-1}} Regards
Jul14-09 02:12 PM
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Suppose a physical quantity needs to be represented in pictorial form...for example distance. Such value represented...
Jul14-09 02:12 AM
9 869
What I mean is, I have read how many equations that model physical phenomena often aren't directly solvable. Instead...
Jul14-09 12:54 AM
6 1,654
and things become much simpler... :smile:
Jul13-09 05:05 PM
21 3,840
im trying to do the Euler problem #14 - to determine which starting value under one million produces the longest chain...
Jul13-09 04:25 PM
9 1,948
like for any algorithm? On wikipedia it lists for multiplication it's O(n^2) but some of them have decimals like...
Jul13-09 09:26 AM
1 778
I was doing some research on game theory and Kuhn Poker, and I read that Player 1 (the player that bet/check first)...
Jul12-09 05:59 PM
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Struggling to put a number through this as I keep getting my original number as the encrypted number too. A = 11 p...
Jul12-09 03:41 PM
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Hallo, When i regard complex function, Why does the transformation w=zn don't "conserve" angels when z go to...
Jul12-09 11:11 AM
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I have just begun studying differentiaition and I was getting confused with how to differentiate a function of x in...
Jul12-09 06:28 AM
4 1,454
The general quadratic equation: Ax2 + Bxy + Cy2 + Dx + Ey + F = 0 How is this derived? How does the...
Jul11-09 10:29 PM
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I'm interested in getting a better answer to showing/proving a graph is a function than the usual "horizontal line...
Jul11-09 09:23 PM
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I am doing a qualification which requires me to chooses a subject for which I will research & produce a presentation &...
Jul11-09 02:51 PM
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Hello, I have a question regarding fft's. My experience with working with fourier transforms is pretty much limited...
Jul11-09 01:36 PM
eric hardin
3 3,658
My proff mentioned something about proportionality: "To make an a proportionality into an equality, we must introduce...
Jul11-09 11:49 AM
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Hi, I'm looking for the formula to get the velocity value from a drag value. I found plenty of resources to do it the...
Jul11-09 05:57 AM
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Say I have a monic polynomial, x^3 + ax^2 + bx + c with a=-2.372282, b=1.862273, c=-0.483023 The discriminant...
Jul10-09 07:56 PM
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I have done some research and it seems like the option to add axes to VectorFieldPlot isn't available in my 6.0.0...
Jul9-09 09:01 PM
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Just had a simple question. but jus wanted to know if it had a simple answer... Is there any way to know if a given...
Jul9-09 06:44 PM
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Yeah i wanna learn some mathematical physics, since i cant just jump from my classes to that different section yet,...
Jul9-09 03:33 PM
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Suppose you pick a random integer n. If it is even, divide the number by 2, if it is odd, multiply it by three and add...
Jul9-09 12:23 PM
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I am trying to compute the following, \prod_{j=0}^{N-1}\left where \hat{I}, \hat{M(j)} are matrices. My problem...
Jul9-09 12:14 PM
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\lim_{x\rightarrowy}\frac{sin{x}-sin{y}}{x-y} so this is the question. I'm here solving this problem you please...
Jul9-09 06:26 AM
4 802
1)We know this limit doesn't \lim_{x\rightarrow-\frac{2}{3}}\frac{2}{2+3x} exists after substituting the value ot...
Jul9-09 06:19 AM
1 683
Hello, correct me if I am wrong, but as far as I know if 2 functions f(x) and g(x) are periodic with Tf and Tg...
Jul8-09 02:42 PM
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I'm reading a paper on tissue cell rheology ("Viscoelasticity of the human red blood cell") that models the creep...
Jul8-09 11:50 AM
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I don't trust myself for reading this alone. Is this valid? ...
Jul7-09 11:17 PM
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Hi , A friend sent me this website, and I was wondering how it worked, ...
Jul7-09 09:14 PM
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Hi, I am pursuing graduate studies in economics, and I hear that "measure theory" is one of the classes that will...
Jul7-09 07:30 PM
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I'm whacked outta solving these problems just hanging around for more than 2 hours for each question but can't solve...
Jul7-09 07:05 PM
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I have found alot of information about how to solve and graph parametric equations, but what I want to know is, what...
Jul7-09 01:49 PM
3 873
Need information about GRE subjective mathematics. can any one help me in this regard
Jul7-09 08:46 AM
2 643
How do I understand them and what they do? I've memorized "soh-cah-toa", but I still don't get what is the point of...
Jul7-09 02:22 AM
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