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Common math questions, quality answers.
Y 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.
Jul22-14 04:33 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...
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Hi can anyone tell me what is tan 50 in fractions? -benzun
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I know that Euler is pronounced Oiler, and Galois is Gale-Wah. Can anyone try to write phonetically Stieltjes,...
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Jun16-09 10:23 AM
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May31-03 06:03 AM
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so I've been doing review and I got stuck on two questions, I was wondering if anyone could help me out. Any help...
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My differential geomtry professor once told me that with all his 30+ years experience in research in differential...
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May26-10 12:07 PM
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if sinh(y)=x, then, show that cosh(y)=sqrt(1+x^2) I know how to prove but i have difficult in choosing the signs. ...
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Hello All I am having problems Verifying this identity (COS A) / (1-SIN A) = SEC A + TAN A I can get the RHS...
Jun28-05 07:09 AM
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I love doing proofs, but hate doing computational questions. If I become very good with proofs but remain just so-so...
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A topological space is a set X together with T, a collection of subsets of X, satisfying the following axioms: 1.The...
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I have an upcoming Linear Algebra exam and my textbooks are really vague in defining certain concepts (and he didn't...
Mar21-03 05:17 AM
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Basic rule is that: a/b=c/d then, a+b/a-b = c+d/c-d but suppose if we apply "componendo dividendo" just to the...
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Last night in a lecture my professor explained that some partial differential equations are used to observe events on...
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I am a doctor with limited mathematics knowledge. I am trying to prove to my medical fraternity that for a given force...
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Ues the limit definition to prove that the stated limit is correct. \lim_{x->-2} \frac{1}{x+1}=-1. The limit def' is...
Sep14-09 04:51 PM
John O' Meara
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Where can I find a free program that can numerically solve simple equations? Thanks.
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0 3,918 Hello all, how to prove the above equation thanks a lot
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As we have seen some mathematical sign lately in this group, because I put you in the drawing of the general sign of...
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Find the relative extrema of f(x)=|3x-x^2|. Normally you solve f'(x)=0 to find the critical points, in that case we...
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Hello, my problem is: Let Q(t) = 8(0.87)^t Find the annual and daily growth rate. Can anyone tell me how...
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is anyone able to recommend a book or a site for a highschool senior that explains how logarithmic tables are made and...
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Let C be the curve: r(t) = (t, t^2, t^3) in R3. Find the equation of the tangent line at P = (2,4,8). In this...
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Hi is there a general formula to find the inverse modulo of "a modulo n"... i know its denoted as a^{-1} and...
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robert Ihnot
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Hi all, I want to implement diffraction of waves by edges. I have a wedge with 2 faces o-face and n-face. I have...
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Hello everyone, I do not understand how:: e raised to ln of x = x ? this notation might make more sense:: e^ln...
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Does anyone know if the following attempt at a proof would qualify as a rough proof of the intermediate value theorem?...
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(Hrm. There doesn't seem to be a good category for Algebraic Geometry; maybe Linear/Abstract Algebra?) Ok, I'm in...
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matt grime
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I am ready to pull the few remaining hairs out of my head with this formula. (This is not a homework questions by the...
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note; This is NOT a homework assignment please help me because i need to know this properly for a test i have tomorrow...
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Hello. I am making a physics calculator, and I have to make a conversion Unit for the program. I need to know this...
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There are two functions f(t) and g(t); t is the independent variable. The distance between the two functions will be...
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Given the system of equations in x and y: 2x-3y=12 3x+ky=10 Could you choose k so the system had...
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Hello, I got pointed to this forum by OfficeShreder. I have a question I've been puzzling myself over for a while. ...
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For reference, let \mathbb N^{\infty} denote the set of all \infty-tuples of the form (n_{1}, n_{2}, \dots) with...
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so solving lim's can be tedious not because they are hard but because you have to continously keep writing lim x->a...
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