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- Math topics not applicable to the categories below. High-school Math
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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.
Aug5-14 02:05 PM fredoniahead 
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All math courses. PDFs, tutorials and web links.
Y 01:06 PM phion 
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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 39,229
Hey, I'm trying to learn how to use LaTeX and while I think it's easy how to form equations and symbols, the thing...
Sep22-05 03:51 PM
tomfitzyuk
2 9,484
This question goes: a, b and c are positive integrers. What is the sum of all possible values of a and b between...
Sep22-05 11:26 AM
Werg22
3 982
http://www.mste.uiuc.edu/users/exner/ncsa/quad/ There's another way of writing the quadratic formula...but how do...
Sep22-05 09:39 AM
arildno
4 3,480
In general (not specifically for forums), what are the different math typesettings? I know there is LaTeX, but I have...
Sep22-05 08:16 AM
amcavoy
10 10,260
Do you know about five-point Laplace operator in numerical calculation? Could you explain for me about this operator,...
Sep22-05 06:00 AM
chethapcamhnvn
0 1,467
I was just wondering if any one has ever tried to make a new fundamental system for solving problems, ranging from...
Sep22-05 05:29 AM
peterbone
2 1,158
Hey, its bin ages since i did any maths, and gotten a little rusty, am i doing this right when solving these...
Sep21-05 05:58 PM
jnahey
8 1,249
has anyone implemented Nick Pears' ground plane segmentation for mobile robot before? this is the link to the pdf...
Sep21-05 07:05 AM
orochimaru
0 1,744
I am having problems to prove this: Show that a graph G remains connected even after deleting an arc (i,j) iff arc...
Sep21-05 03:05 AM
matt grime
5 1,544
I have been researching the bible code theory, and I have a few problems with it. (btw, and ELS value is how many...
Sep20-05 07:59 PM
StonedPanda
15 1,862
I wasn't sure what category to put this in, but here's my problem. There is a parallelogram with 3 given points for...
Sep20-05 04:09 PM
mathman
4 10,403
Prove that of 25 is subtrated from the square of an odd integer greater than 5, the resulting number is always...
Sep20-05 04:04 PM
Werg22
14 1,358
This journal will be the journal that follows through my progress in school. I have some big goals this year, and I...
Sep20-05 01:05 PM
JasonRox
14 2,583
i need to prove that the sequence is increasing, i.e, x_n+1>=x_n which translates into: ^(n+1)>=^n i tried...
Sep20-05 06:57 AM
MathematicalPhysicist
8 1,953
I am trying to figure out an overall reaction constant, but I am getting stuck on the math behind the problem. I am...
Sep19-05 11:06 PM
scrappychic
6 1,145
In this textbook i am looking at it says: "Thus e^y + e^-y =2x or e^2y - 2xe^y + 1 = 0" how did they go from...
Sep19-05 09:58 PM
Hurkyl
5 911
I've currently enrolled in Calculus II and have been thinking lately how far does the most complex present-day math...
Sep19-05 08:25 PM
mathwonk
10 2,201
Is this true? f(x)=sin(x)=x(x-2pi)(x-4pi)(x-6pi)... edit: f(x)=sin(x)=x(x-pi)(x-2pi)(x-3pi)(x-4pi)...
Sep19-05 05:36 PM
shmoe
8 881
Mixture problem example: You need parts of a 30% chlorine and 55% chlorine mixture to make 100 gallons of a 40%...
Sep19-05 04:09 PM
Werg22
1 3,902
From the Not Even Wrong blog, http://www.yaledailynews.com/article.asp?AID=29843...
Sep19-05 03:44 PM
robphy
0 1,748
Actually this might not be a fourier question, but it certainly reminds of Fourier series. Suppose, ...
Sep19-05 03:23 PM
ghotra
2 1,013
Hi, can anyone enlighten me on kalman filter? the maths is overwhelming for me. Thanks in advance!
Sep19-05 10:15 AM
SGT
7 12,996
I have a geometry problem. There is a set of spheres (each has a 3d center coordinate and a radius) and I need to find...
Sep19-05 08:53 AM
peterbone
0 1,527
Hello I have this question that I am not sure what to do. Can somebody please give me a hint or point me in...
Sep19-05 12:03 AM
Tide
1 758
hi, i have trouble understanding these two terms. can anyone explain to me eigenvalues and eigenvectors in laymen...
Sep18-05 06:12 PM
HallsofIvy
2 2,163
does anyone know what they include? here is a prefrence. thanks
Sep18-05 11:21 AM
LeonhardEuler
7 2,006
Hi Guys! well can anyone recomend me websites where i can get some knowledge and techniques to deal with complex...
Sep18-05 11:03 AM
ComputerGeek
1 975
I haven't been here for a long time, so sorry if this was already posted: http://physorg.com/news6555.html Dr...
Sep17-05 04:04 PM
Pythagorean
2 1,726
My question is simple, What is INFINITY? How big or small is it? What does one mean when he/she says that...
Sep17-05 10:32 AM
Hurkyl
5 1,015
just starting up the school year again and my brain is not there yet. Is e^x an even or odd function. also what...
Sep16-05 06:08 PM
shmoe
5 904
no clue how to start this: show sin 3x = 3 sin x - 4 sin^3 x
Sep16-05 04:21 PM
thenewbosco
4 5,068
This is a formula to find the area of a regular polygon with sides of equal length only using the side length. ...
Sep16-05 03:44 PM
Dr Avalanchez
7 1,247
n_1 = 1 a_1 = 1 n_i = i a_i = 8 a_{i-1} + 1 Is it possible to show that a_i - n_i is a multiple of 7 for...
Sep16-05 02:49 PM
LeonhardEuler
6 1,105
I wasn't sure of where this question is best suited but since my interest is only mathematical I figured this is a...
Sep16-05 01:44 PM
Fermat
1 764
Is there any reliable way to convert a series to a product, or the opposite? I was looking at the following and...
Sep16-05 12:45 PM
shmoe
3 12,564
http://www.physorg.com/news6555.html
Sep16-05 12:29 PM
Zurtex
1 1,187
I'm back studying after a couple of years out and have become a little rusty. currently learning about the J...
Sep16-05 12:16 PM
Tom Mattson
4 1,798
I'm sure this is relatively easy, but after an hour or so googling, I can't seem to find the formula for generating...
Sep16-05 04:29 AM
ktoz
1 1,647
confused as heck :bugeye: !: montly rates of return on the share of a stock are independent of one another and...
Sep16-05 02:52 AM
mouse
0 724
I've been away for quite a while, and now I can't find the book forum. :confused: Anyway, I'm looking for a book...
Sep15-05 11:41 PM
fourier jr
1 1,454

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