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

Feb2313 09:24 AM
micromass

1 
40,152 
These identities might be considered as true:
\begin{array}{rcl}
1  1 + 1  1 + \cdots & = & \frac{1}{2} \\
...

Jun210 01:00 PM
g_edgar

20 
2,221 
For some reason, I can not seem to evaluate this integral.
\int \frac{x}{ln(x)} dx
When I plug it into maple it...

Jun210 09:04 AM
Mute

6 
7,956 
The unit normal vector N of a given curve is equal to the first derivative with respect to t of the unit tangent...

Jun110 09:34 PM
lavinia

1 
2,255 
Hello,
How can I find the limit of x^{k}\mathrm{e}^{ax^n} for x\to +\infty.
a,k,n are positive reals.
I even have...

Jun110 08:57 AM
Char. Limit

9 
1,830 
My question revolves around the following derivative:
for z(x,y)
*sorry I can't seem to get the latex right.
...

Jun110 12:50 AM
Quisquis

5 
1,080 
How do you derive the hypervolume/hypersurface of the unit ball in n dimensions? I thought it'd be trivial but oh...

May3110 02:24 PM
Jerbearrrrrr

4 
781 
I've taken maths through calc 3.
I understand the Maclaurin series represents a function f(x) as a power series: ...

May3110 10:13 AM
HallsofIvy

3 
1,568 
So, I was reading the book "Riemann's Zeta Function", by H.M. Edwards, and on page 10 I see an integral I don't quite...

May3110 03:51 AM
jackmell

5 
1,227 
Let's find the Maclaurin Series of tanhx up to powers of x^5
Yeah! Good idea!
I know
Right, f(x) = tanh...

May3110 02:50 AM
tinytim

4 
4,109 
Dear All,
Its my first post on this the physics forum.
i have a question. Can we integrate double integrals...

May3010 09:38 PM
moonkhan

0 
2,214 
quick question, I was watching an MITOCW physics lecture and I want to know where a principle breaks down.
\int^t_0...

May3010 08:27 PM
some_dude

11 
1,396 
I have a function that is parametrized by a direction and returns a signal strength,
F(\theta, \phi) \rightarrow R...

May3010 06:14 PM
coderdave

0 
574 
Hello,
if I have a function f:\mathbb{R}\rightarrow \mathbb{C}, what are the conditions on f for which the derivative...

May3010 04:55 PM
mnb96

2 
1,412 
So i'm trying to find out what the procedure is to convert a cartesian unit vector to a cylindrical unit vector. Any...

May3010 12:45 PM
teslajet

2 
2,879 
My course notes state:
f(x+s) = f(x) + \nabla f(x+ts)^{T}s
for some t \in (0,1)
If f is twice...

May3010 10:23 AM
azay

0 
696 
I know that the Taylor Series of
f(x)= \frac{1}{1+x^2}
around x0 =...

May3010 01:12 AM
Chrispo

11 
52,387 
http://img526.imageshack.us/img526/6766/distrib.png
Just wondering if anyone could help me with finding the most...

May2910 07:20 PM
Jerbearrrrrr

0 
1,150 
How do I calculate
\int_C dz/1z when C is a line segment from 1/2 to \sqrt{3i}.
I know that in the complement of...

May2810 05:55 PM
jackmell

7 
923 
I need to figure this integral out for a graduate research project, however I've been stuck on it for days now:
int...

May2810 01:03 PM
tanderse

4 
2,174 
Hi,
I'm doing calc2, and I have hard time understanding and visualizing the idea of Taylor approximation in my head....

May2810 07:40 AM
estro

2 
738 
Hi All,
I have a question about notation.
Suppose I have an expression:
f(x,g(x,y))
I would like to know...

May2710 09:49 PM
gz_student

2 
731 
Hi all, I am desperately looking for a reference for a summation formula, which I have obtained with Mathematica.
It...

May2710 05:47 PM
Pere Callahan

1 
777 
In my Calculus book, in the chapter that introduces multiple integration, it has a chapter on integrals that calculate...

May2710 10:13 AM
Xyius

6 
1,044 
Hey All,
First post, hopefully it will be readable. I was going to try and word it correctly, but I might as well...

May2710 07:10 AM
HallsofIvy

2 
1,006 
I am just curious, when you perform a loop integral, does the fact that it is a loop integral change the way you...

May2710 03:04 AM
Jonnyb42

2 
819 
My real analysis book says that a path from two points p, q in a metric space M is a continuous function f: > M...

May2710 12:06 AM
l'Hôpital

3 
691 
\delta(x)=\frac{d}{dx}\Theta(x)  delta function like a first derivative of Heaviside step function
\Theta(x)=\int...

May2610 06:55 PM
some_dude

6 
3,478 
My question is in the attached .pdf file.. thanks.

May2610 10:55 AM
denny137

0 
1,564 
rms of sine wave = peak * 1/SQRT(2)
how is this derived from the rms equation?
(Search engines have returned no...

May2510 09:45 PM
halawaliama

13 
75,219 
im trying to prove rouche's theorem for harmonic fcts.
i have already proved the argument principle for harmonic...

May2510 01:02 PM
jem05

0 
623 
I'm trying to simplify this. I have two functions, f0(z), and f'(t, x, y, z). One is the 'base' value that varies only...

May2410 10:40 PM
Mute

4 
1,449 
Can i use box muller transform to generate a distribution with two different sigma (i.e. sigma_x and sigma_y)?
I...

May2410 06:18 PM
Lord Crc

1 
2,538 
im proving this theorem that says if u is a cont fct (piecewise) we have the fct
U(z) = 1/2*pi /integral (0 >...

May2410 01:42 PM
jem05

0 
1,258 
S(\vec{q})= \int_0^r exp(i\vec{q}\cdot\vec{x})4\pi x^2 \ dx
How would one approach this integral?
I tried to...

May2310 12:23 PM
SuperNoob

2 
1,148 
May i know how to find the curvature of a point on a wave function?
e.g
wave function: y=Asin(wx)
and i want...

May2310 03:08 AM
pliu123123

2 
979 
I'm an engineering major taking an advanced level physics class. I realize that I really have no clue when it comes to...

May2210 08:44 AM
HallsofIvy

2 
2,320 
Is f(x)=sin x differentiable at x = pi/2. If yes why?
because what i think is at pi/2 f'(x) changes from 1 to 1 so...

May2210 01:59 AM
R Power

15 
1,637 
w = 1 + sigma(xy)*log(1w);
u = sqrt((1w)*(1+w));
v = u*sin(phi); u = u*cos(phi);
u, v and w...

May2110 06:00 PM
ireland01

0 
5,435 
Hey All,
I'm learning calculus through videos. The videos that I'm watching are really good, but they are...

May2110 01:14 PM
nickto21

2 
720 
Hi all,
I have an ODE with the form
\frac{\mathrm{d}^{2}\phi}{\mathrm{d}x^{2}}+a\exp(b\phi)=0
B.C....

May2010 11:53 PM
SHmech

2 
1,396 