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

Feb2313 09:24 AM
micromass

1 
43,921 
So I have a function which represents motion. This function is x^2 which is also the area of a square. Now, what I...

May1713 07:33 PM
jasonlr82794

17 
984 
Hello,
I am a selflearner. I am teaching myself calculus through different sources on the net, but I feel I book...

May1913 08:26 PM
Mark44

4 
630 
I'm thinking in particular about Lenny Susskind's lectures, but I've seen other lecturers do it too. They'll be...

May1013 05:24 AM
jedishrfu

1 
664 
I dont get it guys. 100% on all the quizes and homework. 42% on the final.... Deptartment policy is that you have to...

May1213 09:21 PM
Simon Bridge

13 
1,041 
Hey guys. So, I'm in an Analysis class and we're at the section on Riemann integrals. I get the theory and the...

May1213 11:45 AM
Tim67

0 
611 
I have an oil spill that spills out at a rate of 100 ft per second. I need to find the rate of change of the radius at...

May1613 12:09 AM
Mark44

1 
455 
So I know that the derivative of the area of a circle is 2∏r or the circumference, and that the derivative of the area...

May1613 05:47 AM
arildno

10 
832 
Hey guys, I know what polynomials are but what I really don't understand is the way you are able to find the equation...

May1713 09:17 PM
Mark44

9 
676 
If we take the variation of a functional of some function \phi(x_1,...,x_n) with \partial_{j}\phi being the partial...

May1513 10:53 AM
pellman

1 
537 
I am trying to solve a function using Solve in mathmatica.
I am solving for multiple constants.
Can i use a solve...

May1313 01:52 PM
Bill Simpson

7 
869 
eg. Find the directional derivative of the function phi=xyz^2 at the point (1,2,3).
Actually what is the math used...

May1513 11:34 PM
Outrageous

6 
1,129 
I've come across this funny problem while messing around with integration by parts. Probably made a mistake somewhere....

May1513 03:02 PM
tade

1 
488 
Dyadic Cube C_{k,N} = X \in\ \mathbb{R}^{n} \frac{k_{i}}{2^{N}} \leq x_{i} < \frac{k_{i}+1}{2^{N}} for 1 \leq i \leq...

May1513 08:00 PM
Astrum

2 
579 
For arbitrary positive numbers ##\epsilon## and ##\delta## we know that ##0<\delta<\epsilon## such that...

May1813 03:08 PM
amirmath

4 
496 
Not sure if this is the right place to post (but its related to a complex analysis questions)
I'm doing a past...

May1813 03:27 PM
FelixHelix

4 
557 
Assume n\in\mathbb{N} and r\in\mathbb{R} are some fixed constants and r>0. I want to find some nice lower bound for...

May1413 12:27 PM
jostpuur

0 
458 
Hi,
If we have f(x) is logconcave in x, can we show that the following inequality is true? Or can we find some...

May1413 11:28 AM
loveinla

0 
401 
I have asked a similar question but it wasn't answered fully so here it goes. Why is it that you only need two points...

May1713 08:06 PM
Mark44

1 
491 
Is
f(x)=\sin\;\hbox{ and }\; g(x)=\sin
Both EVEN function?
It looks even function to me even though it's a...

May1113 11:37 AM
yungman

3 
498 
I've looked examples up online and I just can't figure out what to do exactly when I have (2x^2)/(x^2+1), for some...

May1313 09:11 PM
questionasker1

2 
428 
Hi, a naive question here, but I was wondering if the series
\sum^{∞}_{k=0} k a^{k}
has a particular name? As in...

May1113 02:06 AM
zeroseven

2 
544 
Hello,
Given is the function
f = f(a,b,t), where a=a(b) and b = b(t). Need to express first and second order...

May1313 08:58 AM
Sunfire

2 
636 
Hi,
I'm reading an article that has a sentence saying "where P is a function of period unity.".
Here.
I've...

May1513 02:11 PM
Alesak

2 
485 
Hello all,
I am reteaching myself calculus (I don't remember anything from Calculus in college, and I only took...

May1613 10:15 PM
DrewD

14 
914 
I am trying to make an mathmatical equation which can calculate the length of the wire, which is wounded around a a...

May1313 12:21 AM
215

2 
381 
Hi,
I'm studying the asymptotic behavior (n > infinity) of the following formula, where k is a given constant....

May2013 10:30 PM
Stephen Tashi

1 
536 
Hi guys I am trying to come up with an equation to solve for a break even point. Basically I have an initial outlay of...

May1213 08:28 PM
Sagelm

0 
347 
Let's start with:
$$ \int \frac{dx}{1+x^2} = \arctan x + C $$
This is achieved with a basic trig substitution....

May1213 08:53 PM
piercebeatz

6 
673 
I have this equation 1/(r^2+l^2)^(3/2) and I need to integrate it quickly. My first thought is using this integral...

May1313 02:01 AM
Simon Bridge

7 
522 
Hi,
So f(x,y) = xex(y2  4y)
Find all stationary points and classify them i got
for fx(x,y) s.p (1,4),(1,0)...

May1013 05:19 PM
JoshMaths

2 
587 
I'm testing an algorithm to find the global mimina of a function. Can someone give me a few examples of optimization...

May913 07:37 PM
lugita15

1 
623 
Newton and Leibniz both had a method of differentiating. Newton had fluxions and Leibniz had something that resembles...

May913 07:40 PM
lugita15

4 
721 
Hi
I am currently working on a project, and I need to calculate the definite triple integral of 1/x+y+z. i.e:
...

May913 02:49 PM
NamDogg

4 
639 
My question has to do with Euler's constant towards the end of the proof:
d/dx ln/x = lim h → 0 1/h ln(x+h)  lnx...

May1913 07:35 PM
aclark609

4 
846 
The explanation for this is probably very trivial, but I am not seeing it. I'm reading through Ramamurti's "Basic...

May2013 07:13 PM
leinadle

2 
528 
I have absolutely no doubt this question has been asked many times over, so I apologize in advance for that. This is...

May2113 10:56 AM
Forensics

4 
901 
Wasn't sure which section to put this q in.
Just reading now that f(x,y) can represent the density of a...

May2213 09:03 AM
Vorde

4 
472 
I'm currently working out the Schrödinger equation for a proton in a constant magnetic field for a research project,...

May2113 03:09 PM
WannabeNewton

1 
561 
When I think line integral  I understand when I'm taking a line integral for a function f(x,y) which is in 3D space...

May2213 08:58 AM
HallsofIvy

4 
441 
I'm looking at this problem here. (Exam practice, move to homework if you want...)
http://i.imgur.com/nZ4jRd1.png
...

May2213 08:55 AM
HallsofIvy

2 
407 