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

Feb2313 09:24 AM
micromass

1 
46,523 
Hello.
Let us say that we have a graph f(x)=2x when x does not equal 3, and f(x)=undefined when x=3
The limit of...

T 04:33 PM
CuriousBanker

9 
139 
I would like to ask for help solving this problem. I've been at this problem for a few hours without making any...

T 02:34 PM
PlayingCatchUp

2 
103 
So, a while back i read about this idea, but i cant find it anymore, so i was wondering if anybody else knows about...

T 11:14 AM
bluntwcrackrap

4 
357 
Hey. I'm new to the forum and I was hoping you could help me solve this integral. I was searching for a clue on...

T 04:09 AM
phion

9 
495 
Today was our first lesson in our high school's accelerated calculus class. The class is our school's most second...

Y 11:48 AM
PlayingCatchUp

5 
339 
So my question is regarding the gradient of a function. Suppose we have a function expressed In cylindrical...

Sep1214 04:43 PM
WWGD

3 
242 
What is taylor formula and how it is used in calculators?

Sep1214 06:12 AM
FactChecker

4 
326 
Hello!
I'm having some trouble determining, when trying to find the area between two curves, when to integrate with...

Sep914 10:32 PM
SteamKing

1 
185 
What wrong with my calculation.the problem is from the attachment.
It keeps saying:
NMinimize::nnum: "The function...

Sep914 04:52 PM
gaby287

3 
142 
You know that the problem of calculus of variations is finding a y(x) for which \int_a^b L(x,y,y') dx is stationary....

Sep914 12:28 AM
julian

10 
489 
Hello,
To measure the atomic force with an AFM. One can use the frequency shift of a cantilever. This change of...

Sep814 09:14 PM
pierebean

2 
184 
Several questions I have been thinking about... let me know if you have thoughts on any of them I added numbers to for...

Sep714 12:24 PM
wotanub

2 
303 
Hello everybody,
I'm currently reading the book Special Relativity in General Frames by Gourgoulhon. There,...

Sep614 05:02 AM
Incnis Mrsi

10 
346 
I'm interested to find out how many people would agree on several quick solutions:
10X = 4X
1) X = 0
2) 10 =...

Sep514 09:57 AM
Mark44

2 
199 
For this function
y=\sqrt{2ln(x)+1}
if I use the chain rule properly, should I be getting this answer?
...

Sep514 01:07 AM
Mark44

10 
496 
I have a small confusion about functions and variables. So, on doing a bit of reading, a linear transformation is a...

Sep414 11:19 AM
micromass

9 
360 
Hi,
Is the following integral well defined? If it is, then what does it evaluate to?
\int_{1}^{1} \delta(x)...

Sep414 08:32 AM
Incnis Mrsi

11 
483 
Hi,
I am struggling for some time to solve the following integral:
$$
\int_{n}^{Nn} \left(...

Sep414 08:12 AM
Incnis Mrsi

2 
472 
Hi! I am taking a second look on fourier transforms. While I am specifically asking about the shape of the fourier...

Sep414 07:50 AM
Incnis Mrsi

3 
321 
Hi. Is using the LeviCivita symbol to calculate crossproduct combos like A x (B x C) allot faster than just using...

Sep414 04:55 AM
Incnis Mrsi

3 
393 
I asked to differentiate the given function using exponential function
with sin(√3t + 1) I turned it into Im
...

Sep414 01:42 AM
sozener1

2 
298 
when differentiating
e^(at) * (cos(bt) + isin(bt))
are you able to use product rule to find the derivative...

Sep214 07:03 AM
HallsofIvy

2 
260 
How do I perform this integration:
\int \left (\frac{dy}{dx}\right)^{2} dx
Thanks!

Sep114 04:58 PM
Cruikshank

12 
1,166 
Let a,b are constants.
a=\int_{∏}^∏ f(x)\,dx
and
b=\int_{∏}^∏ {g(x)f(x)}\,dx,
Then by integration...

Aug3114 03:55 PM
mathman

5 
391 
Given: cos(x)\frac{1}{x}
Find \frac{dy}{dx}:
Now I know... \frac{dy}{dx} of cos(x) = sin(x)
and...

Aug3114 12:18 PM
Shinaolord

10 
291 
Hi members,
see attached Pdf file.
For a<0,write b=a and let x=bt.Then
My question:
how becomes the...

Aug3014 07:41 PM
HallsofIvy

1 
264 
I was playing around with some simple differential equations earlier and I discovered something cool (at least for...

Aug3014 07:20 PM
paradoxymoron

4 
472 
So, as i understand, the geometrical meaning of this type of integral should still be the area under the curve,...

Aug3014 03:39 PM
Siddartha

6 
401 
My textbook says the extreme value theorem is true for constants but I don't buy it. I mean I suppose that every...

Aug2914 12:22 AM
Austin

9 
370 
Can someone explain to me why in this equation (attached)
where ρ(t)=\sumδ(tti) , dirac funtion.
in the left...

Aug2614 10:03 PM
Fredrik

3 
363 
First off: I think I understand the chain rule and how it derives from
\lim_{h \to 0} \frac{ f(x+h)f(x)}{h}
...

Aug2614 07:55 PM
Fredrik

8 
397 
Hi
The question is the following: is it possible for a (say) real function to be continuous at a certain point...

Aug2614 08:42 AM
glance

4 
342 
Hi :)
I'm doing my ALevels and have a maths investigation project for which I decided to model the working of a...

Aug2514 07:58 PM
Simon Bridge

10 
640 
I am looking at a solution to an question and I don't understand how the value of the following definite integral...

Aug2414 05:29 PM
SteamKing

7 
454 
I'm doing an undergraduate course in engineering 1st sem. I have physics which contains cumbersome amount of vector...

Aug2314 06:59 AM
mal4mac

2 
374 
Firstly, the set E is defined:
"Let E be the set of all positive real numbers t such that tn<x."
Later on the...

Aug2214 12:51 PM
GMB

3 
1,820 
many books only tell the operation of total derivative and partial derivative,
so i now confuse the application of...

Aug2114 08:11 AM
HallsofIvy

3 
522 
Differentiation by first principles is as followed:
$$y'=\lim_{h\rightarrow 0}\dfrac {f\left( x+h\right) f\left(...

Aug2014 10:23 PM
FilupSmith

15 
2,593 
Apparently,
f \nabla^2 f = \nabla \cdot f \nabla f  \nabla f \cdot \nabla f
where f is a scalar function.
...

Aug2014 12:12 PM
vtfjg87

2 
365 
Let a\in\mathbb{R}, a>0 be fixed. We define a mapping
\mathbb{Q}\to\mathbb{R},\quad q\mapsto a^q
by setting...

Aug1914 06:20 PM
jostpuur

2 
363 