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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.
Y 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
micromass
1 38,224
one (and perhaps the only) example is:2^4=4^2 what more examples are there?
Jul21-03 02:05 PM
suffian
15 3,963
Is the result of a dot product of two vectors valid if the frame of reference unit vectors are not orthgonal? ...
Mar11-09 02:13 PM
Dave in NZ
15 3,962
How do you define "topology" and "analysis"? I'm tempted to say that topology is the mathematics of...anything that...
Aug21-11 03:30 AM
Fredrik
7 3,960
I have a door lever which has a 90 deg. bend. I need to calculate the length that this lever would have to be if it...
Oct26-09 03:49 PM
camacru
3 3,959
I mean it's okay to take 2x-3≠0 as a necessary condition, but I can't actually grasp the fact that we have to take the...
Jan20-12 04:46 PM
Deveno
3 3,958
Hi all ! I came across an article (link: http://www.math.toronto.edu/mathnet/answers/infinity.html#2) The...
Jul15-04 12:01 PM
quartodeciman
33 3,957
Hello, I need your help please? It might seem obvious to you but I can't seem to get my head around how to solve...
Aug13-03 04:33 PM
suffian
11 3,956
Is this method good for analyzing a pulse? Why is the averaging of the spectra good for noise cleaning? What's the...
Jun10-10 04:17 AM
mediocre
4 3,955
What's the general rule for constructing such graphs? I mean actually drawing it on paper.
Jun16-09 10:23 AM
benorin
1 3,952
Okay so I have a couple of questions. Firstly, I'm a self taught math student. I'm teaching myself math and want to...
Mar11-11 03:38 PM
Reagan0mics
9 3,952
Hey, Not sure if this is in the right place, move if necessary. So, I know about SUVATs, and non-constant...
Jul6-09 01:23 AM
Mentallic
16 3,951
I'm aiming to calculate ln(x) numerically. I'm using the following procedure for this: 1) If x is greater or equal to...
Jan26-11 04:40 PM
hotvette
12 3,951
What is the meaning of a pathological function?
Jan17-07 01:03 PM
arildno
12 3,946
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. ...
Sep25-07 11:43 PM
cks
8 3,946
How is it different from the real differentiation and integration? There are so many details that I am finding it...
Apr22-05 06:29 AM
abia ubong
5 3,942
I was helping my friend with his math homework. He's in an intermediate algebra and is working on domains and ranges...
Oct21-08 12:00 AM
DyslexicHobo
4 3,942
Can someone give me the definition of a line?
Nov15-10 08:37 PM
chiro
36 3,942
Hi can anyone tell me what is tan 50 in fractions? -benzun
Aug24-04 07:04 AM
chronon
4 3,939
My differential geomtry professor once told me that with all his 30+ years experience in research in differential...
Feb25-07 12:58 PM
andytoh
30 3,938
I have something like A \rightarrow B \rightarrow C I'd like to put function name's about the \rightarrow's,...
Aug14-08 01:02 AM
dans595
3 3,938
A topological space is a set X together with T, a collection of subsets of X, satisfying the following axioms: 1.The...
May25-09 12:05 AM
maze
9 3,938
so I've been doing review and I got stuck on two questions, I was wondering if anyone could help me out. Any help...
Sep13-10 12:49 AM
Kidphysics
3 3,937
I know that Euler is pronounced Oiler, and Galois is Gale-Wah. Can anyone try to write phonetically Stieltjes,...
Dec11-08 02:48 PM
matticus
3 3,937
I love doing proofs, but hate doing computational questions. If I become very good with proofs but remain just so-so...
Feb1-11 06:11 PM
mathwonk
21 3,936
definitely you can assume the premis and arrive at a truth and then consider your theorem truth only if the way from...
Jun27-08 11:40 PM
DeaconJohn
54 3,936
Is it just me or is it the text didn't explain well enough about continuity? I totally don't understand it. Not only...
May31-03 06:03 AM
PrudensOptimus
8 3,935
hi, I'm stuck and I cant seem to find a simple solution to questions regarding how to find the centre of mass of a...
May26-10 12:07 PM
kolomsg
2 3,935
How one can find the solution to x^y+y^x=100 Where x,y belong to integers?
Jan9-04 01:19 AM
NateTG
5 3,934
Hello everyone, I do not understand how:: e raised to ln of x = x ? this notation might make more sense:: e^ln...
May4-07 11:07 AM
uart
11 3,934
Hello, my problem is: Let Q(t) = 8(0.87)^t Find the annual and daily growth rate. Can anyone tell me how...
Oct29-04 01:36 AM
vsage
5 3,927
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
Hurkyl
26 3,926
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
5 3,926
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
arildno
10 3,925
As we have seen some mathematical sign lately in this group, because I put you in the drawing of the general sign of...
Nov6-07 03:42 AM
Integral
37 3,925
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...
Jan24-10 06:18 AM
HallsofIvy
4 3,925
Hello, I got pointed to this forum by OfficeShreder. I have a question I've been puzzling myself over for a while. ...
Nov21-06 12:30 AM
shmoe
8 3,924
I am a doctor with limited mathematics knowledge. I am trying to prove to my medical fraternity that for a given force...
May7-07 02:22 PM
light_bulb
1 3,923
is anyone able to recommend a book or a site for a highschool senior that explains how logarithmic tables are made and...
Jul18-05 02:24 AM
pl_terranine
4 3,921
http://xs305.xs.to/xs305/06332/ss.gif Hello all, how to prove the above equation thanks a lot
Aug15-06 09:16 AM
benorin
4 3,920
Given the system of equations in x and y: 2x-3y=12 3x+ky=10 Could you choose k so the system had...
Jul11-11 03:13 AM
kdubb22
3 3,919

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