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General Math

- Math topics not applicable to the categories below. High-school Math
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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 33,266
Hello all, Assume we have an optimization problem and that strong duality holds. Will it also hold for another...
Jul17-12 01:12 PM
lementin
4 593
Hi, I am trying to learn strong induction, but I am a bit uncertain in some things about it. In my book, it says...
Nov26-07 10:14 AM
disregardthat
4 7,513
I understand weak induction but I'm confused on strong induction. Can someone give me a simple example where you would...
Jun29-10 06:38 AM
disregardthat
4 6,696
Hi I was playing around with ways to store numbers more compactly in bases other than 2 and, just for giggles, I...
Jun10-07 10:25 AM
X=7
5 2,819
Hello all, I am reading an article and there is something I find odd. The setting is a Banach space E and we have...
Aug14-09 05:15 PM
quasar987
2 999
Hey, I am trying to find a way to isolate the variable Tc in the following equation: ln p(t) = A + (B(Tc - T)^m)...
Sep8-09 02:12 PM
arildno
1 1,300
Hi. We are learning about Laplace transforms at uni and I must say that this is a real pain. I have one questions...
Oct31-13 08:29 AM
UltrafastPED
3 474
Hello Physicsforum, I am trying to compute the following double sum: ...
Feb5-12 04:51 PM
HallsofIvy
2 891
:uhh: I can normally do combinations and permutations, but these two currently stump me. Any help is appreciated. ...
May22-05 09:04 AM
Apophis
3 921
I've been trying to invent a formula for solving certain sides and angels on objects... and I've tried many different...
Dec11-06 07:47 PM
Dr Game
6 1,099
Hello everyone I have a question thus:- Prove lim x -> 0 x^3/e^(x^3) -1 = 1 I have tried to tackle...
Aug11-09 02:08 PM
Elucidus
7 840
Hi folks, I am working through a section on the classical limit of the relativistic doppler shift, but I am stuck on...
Nov21-12 09:24 AM
ck99
3 627
Hi, It seems I've forgotten more of my algebra than I thought. I am putting together a spreadsheet to help a few...
Jan19-11 08:36 PM
yuiop
5 845
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...
Jan5-08 12:13 PM
Jeff Cook
9 1,465
Could some plz help me with this question, really stuck on it! thanks! :wink:
Apr22-05 10:28 AM
uart
8 836
Hey all, I need some help rearranging for R. O=R{1-Cos(28.65S/R)} For those curious, its a Horizontal Sightline...
Jan5-12 07:46 PM
Mentallic
4 1,102
Suppose you are building a sequence consisting of 0 and 1 in such a way that: - you start with 1 - no consecutive 0s...
Dec7-11 02:53 AM
willem2
2 1,070
Hello. I am stuck with linear difference equations and i would like some help. I was given that y(k) =...
Mar11-07 11:43 PM
cshum00
5 1,336
The eigenvalues of the matrix \left(\begin{array}{cc}0 & \frac{1}{2}\\ \frac{1}{2} & 0\end{array}\right) are ...
Apr6-05 11:49 PM
Data
9 901
The eigenvalues of the matrix \left(\begin{array}{cc}0 & \frac{1}{2}\\\frac{1}{2} & 0\end{array}\right) are ...
Apr6-05 10:29 PM
Hurkyl
1 966
A dutch student from Eindhoven, G. Uytdewilligen, solved an ancient mathematical problem: after two years of...
Sep11-04 11:51 PM
Orion1
30 6,243
How much study (maths) do you guys do on average? What motivates you? Your thoughts. :yuck: :confused:
Jul15-04 11:45 AM
capslock
19 3,451
Hello everyone! This is my first post here, though I've been a silent observer in PF for a long time. I'm planning...
Dec27-13 10:13 AM
EJChoi
4 1,001
Hi dear all I am an engineer with usual Engineering mathematics sequence in my college and wants to build good...
Sep27-06 07:35 PM
nlmechanics
0 1,477
Has anyone in here Studied the theory of Order and Chaos? If so, Can you tell me of any good books that addresses this...
May14-04 09:18 PM
Vance
1 1,202
Hello people! I'm studying about collineation. It seems to be simple, but I can't understand so much and I can't find...
Mar27-14 08:43 PM
Simon Bridge
1 315
I was wondering, since recently I've been studying differential calculus on my own, how to memorize all this? I dont...
Nov30-07 10:24 PM
mathwonk
7 1,415
The following integral came up in as part of solving a linear 1st order ODE and it's stumped me. \int \frac{ x \log...
Mar13-06 08:24 AM
uart
10 1,223
I want to find three integers, a b and c, with a^3 + b^3 = 17 * c^3. all each the smallest integer possible
Jun15-05 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} +...
Jan16-07 07:23 PM
cristo
4 1,348
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...
Apr10-05 11:20 PM
lvlastermind
6 1,105
You have 10 days of numbers that are averaged together (10 day avg). The most recent 3 days of numbers also averaged...
Aug5-08 05:20 PM
AD1985
2 1,274
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...
Dec24-04 03:43 PM
Niels
4 2,992
K = \frac{f_F}{1-f_F} OK, I feel like the stupidest person ever, but if I know K, how do I find fF? I even know...
Jan5-04 10:04 AM
uart
7 1,244
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))?...
Jan23-04 09:38 PM
Caldus
4 857
For exmaple you can represent one third more accurately with fractions (1/3) than with decimals (.33 etc etc). So why...
May11-03 06:35 AM
FZ+
2 1,018
I am confused ,whats wrong with the reasoning below ? http://i1091.photobucket.com/albums/i391/lf47/Untitled.png...
May5-11 06:37 PM
Jamma
33 3,038
I know that there is a theorem to calculate the coefficients for a multinomial expansion, but I'm having a hard time...
May21-09 10:10 AM
AiRAVATA
3 2,333
Like the title says... I should be way past this (in ODEs+Lin. Algebra). I'm just really tired, have a final tomorrow,...
May4-11 08:56 AM
Ryumast3r
5 1,061
http://imageshack.us/photo/my-images/809/equationu.png/ I'm not understand this simple step. Btw, this...
Oct19-11 12:21 AM
Char. Limit
1 571

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