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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
1 33,254
Just have a question about the dirac delta function. I understand how you would write it if you want to shift it but...
Feb1-06 06:32 PM
1 3,761
Hi, Usually for question like 1/(e^x) I can get rid of the fraction by writing it as e^-x. FOr a question like...
Feb2-05 04:41 PM
4 3,760
What do the following differential symbols mean: δ, đ (the line is actually more slanted) Ive seen these come up in...
Apr7-06 03:52 AM
5 3,760
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
4 3,760
Hi all, I am learning the axiomatic construction of Naturals, from the Peano axiom. Hence proving every property of...
Jul7-08 03:37 AM
5 3,759
IN the Arxiv. they have put a paper on Hlbert-Polya the operator: H= -\frac{d^{2}}{dx^{2}}+V(x) ...
Dec29-06 05:56 PM
6 3,755
The spherical geometry thought that in the surface does not have the parallel line, actually this idea is wrong,...
Oct12-10 09:44 AM
50 3,754
The one formula I need I cannot find. I have an Oblate Ellipsoid which I can describe as a=b=2c. The values of a,...
Mar8-11 10:03 PM
13 3,753
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
1 3,750
Hello there I have to write an interdisciplinary project at school, in mathematics and physics, where I have to go...
Sep25-08 02:23 PM
4 3,750
I saw a contour integral in a text I was recently reading, but unfortunately a contour integral is beyond my...
Jan30-10 07:35 AM
15 3,749
What are they and how are they used? Anyone know?
Jun24-04 04:19 AM
Thomas Jewitt
11 3,747
Is there a more convenient way to multiply and divide imaginary numbers than converting back and forth from phasors?...
May18-10 10:32 AM
6 3,747
In Stastitical Probabilities, the outcome is intepreted as a fundemental 'Law like' process. Is this based on...
Oct30-03 12:33 PM
2 3,746
Hi, can anyone explain to me what the purpose of finding the envelope function is? I understand graphically that...
Nov20-11 02:16 AM
Simon Bridge
7 3,744
When you use Microsofts calculator's Exp function it does not raise the number you enter exponenently it requestions...
Nov3-06 06:38 AM
3 3,741 This is a game about probability: Say there is three doors. Two...
Aug21-11 11:25 PM
Dr. Seafood
32 3,739
Could someone please suggest a good book for beginning abstract algebra (which would allow me to begin learning number...
Aug12-04 04:13 PM
5 3,736
I was wondering if there are any branches of maths that I can work through, that don't require a very deep math...
Jan25-07 09:11 AM
26 3,736
ok so im working through a problem,got part way through and realised i couldnt remeber what to do with power rules,if...
Jul4-10 09:58 AM
3 3,735
There have been strange number systems used in the past in different parts of the world ... do you know any? :biggrin:
May25-04 07:34 PM
11 3,734
Hi all. As the question suggests, there is nothing much I need to explain. It's simple: what is xn=y, if x and n are...
Feb25-10 03:35 PM
7 3,733
So I was thinking about numbers like pi. If you were to measure the area or circumference of a sphere in real life,...
May2-11 01:10 PM
I like Serena
20 3,733
Hi there, I'm researching buckyballs and I'm trying to find equations for determining the dihedral angles of a...
Dec28-06 11:41 AM
0 3,732
Does anyone have a copy of Wells' "Penguin Dictionary of Curious and Interesting Numbers" 1986 or 1987 edition? I'm...
Jul6-10 07:33 PM
10 3,731
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
3 3,730
Hi all, This is a weird question, I want to measure angles in terms of 360 degrees and not 180. The two lines...
Oct31-07 09:10 PM
6 3,728
Can someone give me the definition of a line?
Nov15-10 08:37 PM
36 3,728
Sorry if this isn't the right forum, I didn't know so I just went to general. Could someone explain how this i...
Oct16-04 10:53 AM
60 3,727
Say you have a sphere, and n points to place on it. You want each of the points to be equivalent to the others if you...
Feb6-07 05:46 PM
5 3,727
how do you prove that sqrt(2) + sqrt(5) is irrational...
Mar18-05 08:59 PM
11 3,723
Where can I find a free program that can numerically solve simple equations? Thanks.
Apr3-08 03:13 PM
0 3,723
Hello I'am a little confused. In my text book it is written that all odd function can be described by a sine...
Apr6-11 04:20 PM
2 3,722
I just stare at difficult proofs. I truly do not understand induction. Like if I was to prove Fermat's Little Theorem,...
May1-07 04:18 PM
6 3,720
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
21 3,720
I have problems to calculate the integral I(dxexp(-ax**2)), where the limits run from -infinite to infinite. ...
Jan9-09 01:28 AM
10 3,719
I need to know how to integrate this function: sin(sqrt(x)) I did this: u = sqrt(x) du/dx = 1/(2sqrt(x)) ...
Jan29-05 12:24 AM
robert Ihnot
7 3,719
1) if 11+35=128 , 9-25=76 , 5*50=250 , 40/8=??? 2)if 5+6= 29 , 3+4=10 , 10/8=50 , 9-64 = ?? i wait your...
Oct26-07 10:23 PM
5 3,719
as concept in k-regular bipartite graph is a graph...
Apr22-04 02:45 AM
0 3,717
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
11 3,715

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