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

Feb2313 09:23 AM
micromass

1 
33,208 
Hi,
It seems I've forgotten more of my algebra than I thought. I am putting together a spreadsheet to help a few...

Jan1911 08:36 PM
yuiop

5 
844 
All,
Hey, it's been a while since I've posted, but I have a problem that I am having a hard time moving forward...

Jan508 12:13 PM
Jeff Cook

9 
1,464 
Could some plz help me with this question, really stuck on it! thanks! :wink:

Apr2205 10:28 AM
uart

8 
834 
Hey all,
I need some help rearranging for R.
O=R{1Cos(28.65S/R)}
For those curious, its a Horizontal Sightline...

Jan512 07:46 PM
Mentallic

4 
1,098 
Suppose you are building a sequence consisting of 0 and 1 in such a way that:
 you start with 1
 no consecutive 0s...

Dec711 02:53 AM
willem2

2 
1,067 
Hello. I am stuck with linear difference equations and i would like some help.
I was given that y(k) =...

Mar1107 11:43 PM
cshum00

5 
1,332 
The eigenvalues of the matrix \left(\begin{array}{cc}0 & \frac{1}{2}\\ \frac{1}{2} & 0\end{array}\right) are ...

Apr605 11:49 PM
Data

9 
898 
The eigenvalues of the matrix \left(\begin{array}{cc}0 & \frac{1}{2}\\\frac{1}{2} & 0\end{array}\right) are ...

Apr605 10:29 PM
Hurkyl

1 
965 
A dutch student from Eindhoven, G. Uytdewilligen, solved an ancient mathematical problem: after two years of...

Sep1104 11:51 PM
Orion1

30 
6,237 
How much study (maths) do you guys do on average?
What motivates you?
Your thoughts. :yuck:
:confused:

Jul1504 11:45 AM
capslock

19 
3,450 
Hello everyone! This is my first post here, though I've been a silent observer in PF for a long time.
I'm planning...

Dec2713 10:13 AM
EJChoi

4 
996 
Hi dear all
I am an engineer with usual Engineering mathematics sequence in my college and wants to build good...

Sep2706 07:35 PM
nlmechanics

0 
1,476 
Has anyone in here Studied the theory of Order and Chaos? If so, Can you tell me of any good books that addresses this...

May1404 09:18 PM
Vance

1 
1,199 
Hello people!
I'm studying about collineation. It seems to be simple, but I can't understand so much and I can't find...

Mar2714 08:43 PM
Simon Bridge

1 
314 
I was wondering, since recently I've been studying differential calculus on my own, how to memorize all this? I dont...

Nov3007 10:24 PM
mathwonk

7 
1,414 
The following integral came up in as part of solving a linear 1st order ODE and it's stumped me.
\int \frac{ x \log...

Mar1306 08:24 AM
uart

10 
1,221 
I want to find three integers, a b and c, with a^3 + b^3 = 17 * c^3.
all each the smallest integer possible

Jun1505 09:26 AM
matt grime

13 
1,004 
Here is the fraction that I don't know how to combine and simplify, please help me out! Thanks! =]
\frac{5}{a} +...

Jan1607 07:23 PM
cristo

4 
1,347 
The quadratic equation x^2 + mx + n = 0 has roots that are twice those of x^2 + px + m = 0, and none of m, n, p is...

Apr1005 11:20 PM
lvlastermind

6 
1,099 
You have 10 days of numbers that are averaged together (10 day avg). The most recent 3 days of numbers also averaged...

Aug508 05:20 PM
AD1985

2 
1,271 
How do I solve the following equation?
8n^2 = 64 n lg(n); (0 < n)
n = 8lg(n)
10^n = 10^8 n
...??? How do I...

Dec2404 03:43 PM
Niels

4 
2,991 
K = \frac{f_F}{1f_F}
OK, I feel like the stupidest person ever, but if I know K, how do I find fF?
I even know...

Jan504 10:04 AM
uart

7 
1,239 
If f(x) = square root of x and g(x) = x + 1, then:
1. What is f+g(x)?
2. Domain of f+g(x)?
3. What is f(g(x))?...

Jan2304 09:38 PM
Caldus

4 
856 
For exmaple you can represent one third more accurately with fractions (1/3) than with decimals (.33 etc etc). So why...

May1103 06:35 AM
FZ+

2 
1,017 
I am confused ,whats wrong with the reasoning below ?
http://i1091.photobucket.com/albums/i391/lf47/Untitled.png...

May511 06:37 PM
Jamma

33 
3,034 
I know that there is a theorem to calculate the coefficients for a multinomial expansion, but I'm having a hard time...

May2109 10:10 AM
AiRAVATA

3 
2,329 
Like the title says... I should be way past this (in ODEs+Lin. Algebra). I'm just really tired, have a final tomorrow,...

May411 08:56 AM
Ryumast3r

5 
1,061 
http://imageshack.us/photo/myimages/809/equationu.png/
I'm not understand this simple step.
Btw, this...

Oct1911 12:21 AM
Char. Limit

1 
570 
errors that I make commonly are ANNOYING.
Examples:
Forgetting to add or multiply something, and just using 1...

Jan2606 11:13 AM
shmoe

24 
1,768 
From here, I got the following quote
The author speaks about Lie groups, not Lie algebras. I do not understand...

Apr1110 01:36 PM
kexue

0 
1,681 
I came across 'sub hemisphere' and 'super hemisphere' in physics. How do they look geometrically?

Mar3011 01:14 PM
zorro

0 
1,311 
What no geometry subforum? :smile:
Well, anyway, here is my problem. I am writing some software that uses...

Feb907 11:47 AM
socrates

0 
3,542 
my lecturer use \leq for subgroup.
For example
H \leq S means H is a subgroup of S.
But is it a wrong use of...

Sep2210 01:40 AM
arkajad

4 
2,055 
NOT a home work
A person moves with constant speed of 10m/s(Initially as well as finally). His acceleration is...

Jun213 01:36 AM
Mentallic

12 
1,167 
some antiderivatives (partial fractions, trig sub, etc) can be nightmares to compute, but I remember series solutions...

Nov1109 05:57 PM
fourier jr

3 
805 
I believe I have proven a famous open problem in mathematics, and no, it is not the Riemann Zeta hypothesis although...

Aug711 11:41 AM
ArcanaNoir

15 
2,483 
The subset sum problem is NP complete. What if we replace summing with multiplying? Would it still be np complete?

Jul1810 05:30 PM
Dragonfall

2 
1,603 
Is it possible to show that the SUBSETSUM problem can be solved in polynomial time if the target t is given in unary?...

Jul2606 06:51 PM
0rthodontist

3 
5,234 
Given an ncube, what is the probability that a random subset of its vertices will contain a face of dimension at...

Feb314 01:24 PM
Dragonfall

0 
305 
Well it's not homewrok cause i dont need to hand this question in, this is why i decided to put it here. (that, and...

Nov2107 03:06 AM
MathematicalPhysicist

6 
1,820 