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

Feb2313 09:24 AM
micromass

1 
40,041 
i have reached a chapter in my pure mathematics text that introduces usubstitution as a method for solving integrals...

Jul1913 09:31 AM
lukka

4 
530 
I'm taking a short Calculus session this summer and the teacher zooms through things. I still don't fully understand...

Jul2113 08:25 PM
jasonRF

35 
1,863 
10.\bar{9}=dx?

Jul1713 10:24 AM
Mandelbroth

14 
904 
1.)does an infinite number of zeroes summed up equal a finite value?
2.)does dx=0?
3.)does 2xdx=0?
4.)the...

Jul1613 03:18 PM
DeIdeal

31 
1,627 
Is there a treatment of "infinitesimal operators" that is rigorous from the epsilondelta point of view?
In looking...

Jul2313 09:25 AM
Stephen Tashi

68 
3,559 
A Union of a FINITE collection of closed sets is closed. But if it is an infinite collection?
Can someone provide an...

Apr511 12:04 PM
Bachelier

2 
842 
We know that every discrete metric space with at least 2 points is totally disconnected.
Yet I read this:
A MS that...

Apr511 12:33 PM
Bachelier

6 
1,295 
For months I have been staring into this expression, and I cannot visualize what the hell omega represents...
...

Apr511 12:58 PM
Bassalisk

4 
829 
What led to the definition of the Laplace transform ?

Apr511 11:19 AM
neginf

0 
457 
I just learned that d/dxr(t)=1/r(t) X r(t)*r'(t), where * is the dot product and X is mutiply. What is the meaning...

Jul1913 03:58 PM
Chestermiller

3 
562 
Its been a while since I've done any type of calculus.
So here we go. Vectors is this scenario represent cords,...

Jul1713 05:54 PM
jedishrfu

1 
368 
So I'm trying to study for my calc 3 exam, but I have noticed that my book doesn't have many limit questions that use...

Jul1713 04:31 PM
Mandelbroth

1 
510 
I would like to take divergence of the following expression
∇.((xi × xj × xk)/r^3), which is a triadic.
here ...

Jul1713 08:48 AM
praban

0 
714 
so, the magnitude of the cross product represents the area or volume enclosed by any 2 or 3 vectors respectively, but...

Jul1713 05:00 PM
electricspit

2 
507 
equation of the form
ax+bx+cx=a0+b0+c0
ax+bx+cx=d
what exactly does "d" represent? is it the distance of a...

Jul1713 06:54 PM
LCKurtz

5 
508 
Hi there. I am dealing with a mathematical problem which seems to be much harder than I initially expected:
...

Jul1913 11:19 AM
KingBongo

9 
597 
For the series such that: \Sigma _{n=1} ^{\infty} a_n =\Sigma _{n=1} ^{\infty} b_n A certain theorem says that these...

Jul1613 11:12 AM
Office_Shredder

11 
997 
if space curve C=<f(t),g(t),h(t)>, and
v=\frac{dC}{dt}=<\frac{df(t)}{dt},\frac{dg(t)}{dt},\frac{dh(t)}{dt}>
Why...

Jul1613 07:43 PM
WannabeNewton

3 
558 
How to find the integral of sin x dx?
$$\int sin x dx=?$$

Jul2313 02:17 AM
CompuChip

20 
1,071 
how do I find the integral of ∫√(t^4+x^3)dt from 0 to x^2?

Jul1813 10:39 PM
lurflurf

1 
285 
Hi there,
I am trying to calculate both volume and moment of inertia of shapes which surface coordinates are...

Jul2013 04:00 PM
power11110

6 
541 
So i realize that the integral of is pretty much the height of the rectangle f(x), multiplied by the width dx. But...

Jul2113 01:39 PM
Mandelbroth

6 
627 
So, I'm studying normalization (Quantum Mechanics). I came across examples of integrands which they say are odd. So,...

Jul2113 07:47 AM
jhosamelly

11 
1,065 
I was looking at an example where it was evaluating a closed loop integral of a vector field around a triangle (0,0)...

Jul2213 01:32 PM
wahaj

2 
424 
Hello I'd first like to state I know how to solve and I know the answer to this integral however when I first looked...

Jul2213 11:35 AM
jbunniii

3 
450 
The volume of a sphere with radius r is
v = \frac{4}{3}\pi r ^{3}
It makes sense that its derivative with...

Jul2313 05:57 PM
lurflurf

4 
585 
In an earlier post i was shown how to represent an integral as an infinite sum. So why is the anti derivative a...

Jul2213 10:02 PM
LeonhardEuler

4 
536 
Hi there, I just started to learn about gradients. I can calculate them with ease; but I don't think I really...

Jul2513 08:31 AM
economicsnerd

7 
710 
f is a positive decreasing function of x, f(n) = an for all n:
\int\stackrel{n+1}{1} f(x) dx \leq a_{1} + a_{2} +...

Jul2313 12:56 PM
tolove

2 
472 
Please help, I am running out of my wits trying to solving this equation:
\int_{0}^{2\pi}e^{jz\cos...

Jul2313 07:06 PM
yungman

8 
655 
Hello,
I provided a snapshot of the definition of a Total Differential, that my textbook provides. I am having...

Jul2513 06:58 PM
CubicFlunky77

6 
685 
so before i start this is extracted from spivak's calculus proof
now here is the problem the teacher who taught us...

Jul2413 04:25 PM
Andrax

4 
478 
Hi there,
I was wondering if it is possible to find the roots of the following polynomial
P(x)=x^n+a x^m+b
or...

Jul2413 05:51 PM
nergal

2 
429 
I've always thought of the gradient of a scalar function (id est, ##\nabla\varphi##) as being a vector field. However,...

Jul2413 07:48 PM
WannabeNewton

5 
562 
in a text a read that
" \oint \nabla A \cdot dl = 2 \pi n
wich implies that the gradient of A has a pole...

Jul2413 11:02 PM
lurflurf

1 
489 
Hello, I'm getting slightly confused by the following so was hoping someone may be able to clear my problem up.
For...

Jul2913 03:31 PM
Sir James

4 
644 
Hi,
Could you help me to understand the following expansion I found in a book of qunatum mechanics.
...

Jul2513 08:22 AM
sharan swarup

4 
482 
So I'm in the Navy. I work on an aircraft carrier that just went into drydock. The drydock has a large trapezoid door...

Jul2613 02:28 PM
Tclack

6 
653 
If we have the function
f : x \mapsto f(x) = 3x^2,
I am used to Lagrange's prime notation for the derivative: ...

Jul2713 04:36 PM
cra18

5 
640 
I was reading this problem on calculating the probability of hitting a certain region on a dartboard. The number of...

Jul2813 06:43 PM
Stephen Tashi

4 
603 