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

Feb2313 09:24 AM
micromass

1 
40,150 
Integrals containing \frac{1}{\sqrt{x^2+a^22xa \cos{\theta}}} occure frequently in physics but I still have problem...

T 07:30 PM
scurty

2 
117 
let D be simple connected Domain and C be simple close curve in D.
then by cauchy integral theorm ∫(z) dz over C ...

T 05:17 PM
homeomorphic

3 
105 
Assume that f:\mathbb{R}^N\to\mathbb{R} is a differentiable function and that x_0\in\mathbb{R}^N is a local minimum of...

T 01:20 PM
mfb

7 
155 
I don't quite understand the context of common tangent problems.
This is one of the problems I am trying to solve:...

T 11:46 AM
Mr. Fest

8 
128 
Hi!
Consider the function
\frac{d^n}{dx^n} \sum_{k=1}^m \sin{kx}, \quad 0 \leq x \leq \pi/2 .
If n is odd...

Y 11:16 PM
Simon Bridge

1 
147 
I guess I have several definitions of df flying at me, and I am having trouble getting a continuous definition. So in...

Y 05:37 PM
gopher_p

1 
100 
Hello,
This might seem like a very basic problem for the most of you but I am a little bit confused as to the...

Y 10:37 AM
Mr. Fest

6 
137 

 
 
 
So here's a little background for the question:
I have an arc that covers 3/4s of a circle (so it's not quite a...

Apr2214 05:12 PM
alpha754293

7 
169 
I am currently writing a c++ program to calculate the Value of the Reimann Zeta Function, The problem is At the state...

Apr2214 05:02 PM
cmcraes

0 
104 
Hi,
I need some clarification on exactly which critical points are saddle points. The definition I am finding...

Apr2214 02:01 PM
D_Tr

2 
151 
Hello everyone,
I have recently bumped into the Kramers Kronig Relations while reviewing some of my Eletromagnetism...

Apr2114 08:29 PM
jbunniii

7 
233 
Say for some general function f(x), and g(x) = ∑x=0∞ f(x) (assuming function is defined)
Is there a way to find the...

Apr2014 03:30 PM
cmcraes

8 
208 
So I was doing my calc homework when I stumbled upon this thought:
lets say you were trying to find the solid of...

Apr2014 02:11 PM
SteamKing

1 
138 
Hi
I am facing a mathematical problem in my research. I am not a maths magor and i need to do this to move on with my...

Apr2014 12:58 PM
Aladdin123

22 
460 
I do not know how to formulate formulas on this forum so I just wrote it neatly on a piece of paper and linked it.
...

Apr1914 07:21 PM
Mark44

1 
149 
How is this limit evaluated?
\lim_{k>0}\frac{sin(\pi k)}{sin(\frac{\pi k}{N})}
I know that it is N, but I...

Apr1914 01:54 AM
JJacquelin

1 
282 
If exist a connection between the infinitesimal derivative and the discrete derivative $$d = \log(\Delta + 1)$$...

Apr1814 05:17 PM
Jhenrique

6 
188 
Hey guys, just trying to understand how the quotient rule is derived, so I head over to wikipedia and saw this:
...

Apr1814 02:14 PM
gomess

4 
183 
Hello,
I have a real world application that I need some help with. I am sensitive to the fact that this is not the...

Apr1814 01:12 PM
berkeman

2 
155 
Hello,
Wolfram is giving me the required answer however, the steps it uses I find very confusing. Can anyone share...

Apr1814 09:53 AM
Mark44

1 
200 
For my own use and consumption, I created a generalization of the nth integral of a function f and I'm posting it here...

Apr1814 03:03 AM
pwsnafu

5 
271 
Accidentally I wrote in the wolfram f(x) = f(1/x) the the wolfram give me the solution for this equation (f(x) =...

Apr1714 08:45 PM
Simon Bridge

11 
353 
Hi all, I'm working on some QFT and I've run into a stupid problem. I can't figure out why my two methods for...

Apr1714 01:51 PM
welcomeblack

2 
188 
Hello,
I've come across equations where people use the approximation
\int_0^1 \exp(f(x))\, dx \approx \exp \left(...

Apr1614 09:57 PM
welcomeblack

1 
195 
Hi
I am currently reading a book where this showed up:
The author gave a ##3## parameter equation (note ##Y##...

Apr1614 12:20 AM
Red_CCF

1 
383 
i'm trying to integrate this:
$$W=\frac{ε}{2}\int{\vec{∇}\cdot\vec{E})Vdτ}$$
where ε is a constant, E= ∇V, τ is...

Apr1514 09:35 PM
Simon Bridge

4 
290 
I am working on the derivation of the angular momentum squared operator (in quantum mech.) and there is one step that...

Apr1514 07:53 PM
hideelo

2 
177 
\int \frac{d}{dx}f(x)dx = f(x) + C_x \iint \frac{d^2}{dx^2}f(x)dx^2 = f(x) + xC_x + C_{xx}
\int...

Apr1514 02:48 PM
Mark44

7 
339 
Hey guys, I'm really really confused on how we come about the plane z = x  y. I always have been and it's proving to...

Apr1514 08:47 AM
HallsofIvy

2 
212 
I'm brushing up on calculus. I don't see how this derivative works.
x(t) = A cos(ωt  \varphi)
v(t) = dx / dt = ...

Apr1414 06:49 PM
jbunniii

1 
212 
I understand how to use it, but I'm just getting really confused on when you use it? Is there a way you can look at...

Apr1414 06:45 PM
Jhenrique

4 
321 
Hi!
I am having trouble following the derivation from Euler's Equation to Bernoulli's Equation. The trouble lies in...

Apr1414 01:38 PM
Einj

3 
290 
how do I find the derivative of tanh^1(sinh(2x))
do I just find derivative of tanh^1(x) this then substitute...

Apr1314 08:14 PM
AMenendez

2 
281 
please tell me if i did this correctly:
task: i'm trying to divide the differential dA by dV
where.. dA =...

Apr1314 03:57 PM
HallsofIvy

3 
254 
Hi all ! I'm new here :)
So I'm facing some confusions here regarding integration by parts. While surfing through...

Apr1314 01:10 AM
O.CModderz

9 
416 
the coordinates of cycloide are
##x= a (\theta sin \theta)##
##y= a(cos \theta 1)##
If i use ##\theta =\omega...

Apr1214 10:16 PM
Simon Bridge

3 
270 
A uniformly convergent sequence of continuous functions converges to a continuous function.
I have no problem with...

Apr1114 01:26 AM
GenePeer

5 
585 
Hello. My first time posting here. So... My question is kinda hard to explain but I will try to. So we all know about...

Apr914 02:00 PM
AlfredB

0 
280 
Hello,
Consider two particles which interact via a Gaussian potential:
V(\mathbf{x}) = \exp(\mathbf{x}^2)
I...

Apr914 11:08 AM
Irid

0 
238 