
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:23 AM
micromass

1 
38,029 
550,000Hz = 1 / (2 π √ L*1800E12C )
I'm trying to isolate for L but I can't seem to do it right.
multiply...

Feb2805 08:41 PM
Moo Of Doom

1 
826 
Hi!
I'm new here and this is my first post. :smile:
I'm not sure whether this thread is where it should be, but the...

Nov104 06:39 AM
HallsofIvy

2 
1,599 
I am trying to write a computer program that involves finding 2 very large numbers (several thousand digits) and...

Jun2511 06:39 PM
Stephen Tashi

5 
1,225 
Hi guys i am new at mathematics, so i would like some suggestions on some math books, concerning calculus I and II. I...

Mar1407 07:11 AM
arevolutionist

1 
1,842 
I know that if V is a direct sum of U and W,
then
1. V=U+W
2 there is no intersection between U and W
...

Mar2811 08:29 AM
Stephen Tashi

2 
576 
1:....
2:....
3:....
4:
Y = A cos(Bx+C)+K
Y = A sin(Bx+C)+K
I know what A,B,C, and K mean.. and I Also...

Feb509 08:10 AM
wajed

2 
1,186 
Nothing enlightening in this post, or even informative. Just the overwhelming need to complain about my own stupidity....

May1105 08:13 AM
saltydog

9 
1,459 
Sorry to bother you guys.. but if there is someone out there that is good at math and wouldnt mind helping me.. could...

Sep904 10:03 PM
Tide

11 
1,293 
http://web01.shu.edu/projects/reals/infinity/irrat_nm.html
Well there is the proof i am reading and trying to...

Nov2607 06:56 AM
uart

4 
3,591 
I am confused with sequence and continuous functions.
I am confued with their limit. how do they know the min and...

Aug3009 12:15 PM
slider142

4 
786 
I found S(4,5,15) do not exist. some one had found?
Donald L. Kreher and Stanis raw p. radziszowski have an algorlthm...

Jul1609 07:34 AM
zansan

0 
555 
Ok, first, Let me just briefly explain the Gergonne Point
A triangle and thake an inscribed circle, Join each...

Jan1408 08:27 PM
wowolala

0 
1,258 
I should have mentionned it, but I rather think about it first.
Suppose f:A>B and g:B>C
then g*f:A>C
That...

Sep1704 01:06 PM
JasonRox

8 
1,178 
Too bad I've forgot how to do this though. I'll paste the problem:
f(x) = 16000 + 50x + 0.2x^2
What happens if x...

Jun1207 08:35 AM
BSMSMSTMSPHD

6 
1,397 
It should be really simple, but I think the algebra is bogging me down:
\frac{n!}{(ni)! i!} + \frac{n!}{! (i+1)!}...

Jun3009 05:36 AM
HallsofIvy

3 
848 
What is the qualitative difference between rms and the mean of the absolute value? For what datasets do they differ...

Aug1009 08:59 AM
TacTics

1 
1,096 
I've heard, a few times in my life, that something like 90%+ of mathematics that currently exists cannot be solved....

May207 04:33 PM
Crosson

8 
3,068 
Probably not that important...
3^n = k
What does k equal, expressed through integers, when n is greater than or...

Jul508 06:25 PM
Werg22

6 
1,513 
Hello i am looking for a webpage without snobish referees that only want famous people to publish their job,i am...

Feb1705 04:45 AM
matt grime

18 
2,389 
Hello,
Trying to solve an equation about sonar range equation and can not end up with a feasible solution.
The...

Dec2407 03:34 PM
zibifnik

2 
4,893 
This video has started bouncing around my math department and I thought I would share. It's a math love song by these...

May405 04:45 PM
houserichichi

4 
2,008 
Hi all.
I look up and down this thread and see that the threads are rather intellectual but I have a question that...

Apr1005 05:01 PM
hypermorphism

24 
2,741 
How do professional scientists make sophisticated calculations, e.g the Einstein's tensor equations in general...

Apr2305 05:38 PM
Starship

4 
1,246 
I found this quite interesting. Enjoy.
http://www.physics.harvard.edu/~plu/publications/Science_315_1106_2007.pdf

Feb2707 04:51 AM
Doodle Bob

6 
1,558 
Sorry, wrong title...

Nov1110 08:57 PM
k_squared

0 
432 
hello people. Im sorry about this post becuse i have been reading some of the posts here and they are really high lvl...

Oct3007 06:09 PM
symbolipoint

3 
1,262 
A friend of mine gave me this problem to solve because he couldn't and I've been stuck in it for some time and also...

Aug2810 12:22 AM
Office_Shredder

3 
1,034 
Is anyone able to provide a resource for the proper formulae to use in determining blade dimensions for an aperture...

Mar214 10:28 AM
Stephen Tashi

1 
366 
im trying to proove that d_abc=(a^2+b^2+c^2)^0.5
that the space diagonal of a cuboid equals the square root of the...

Nov2103 11:15 AM
jcsd

2 
7,433 
Here's a problem which I encountered a while ago:
"There is an alien on the surface of a spherical planet. The...

Oct1307 01:48 AM
magic_castle32

7 
1,869 
I have the following problems :
1) out of 2 dimensional views (snapshot or photos), from an origin, how to compute...

Nov2505 11:11 AM
kleinwolf

0 
1,249 
I'm trying to prove the following theorem using graph theory:
I first tried to come up with an example:
Graph...

May1405 11:16 PM
neurocomp2003

8 
939 
hi,
what's the spanning tree from the graph shown? it was on a test and i'm curious as to if i'm right or not.
...

Jul2605 09:06 AM
barneygumble742

2 
1,203 
Hi all:
I need to solve a sparse linear system, I found the iterative methods library which probably fit my...

May2708 09:24 AM
Asuralm

0 
2,662 
A periodic function is one that ##f(\theta) = f(\theta + nT)##, by definition. However, the argument ##\theta## can be...

Apr2014 08:33 PM
gopher_p

3 
376 
what do spatial dimensions higher than the third dimension mean? what do they represent. any object can be described...

Jul2211 02:21 PM
SteveL27

13 
2,135 
Suppose a generalization of planar graph is considered into 3D space :
a graph is said "spatial" if it can be...

Oct1613 12:06 PM
jk22

12 
4,646 
Which subjects should I study to speak mathematics in a superior form? Also, which books do you recommend?

Sep2406 09:37 AM
CRGreathouse

7 
1,553 
This is the equation for the Rank Correlation Coefficient:
1 \frac {6 \sum d^2} {n(n^21)}
can anyone explain...

Feb1405 03:15 PM
ohwilleke

1 
3,325 
Find all positive integers n (n will be called special)
such that if n divides a three digit number say ABC where A =...

Aug2508 09:08 PM
DejMar

12 
6,701 