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

Feb2313 09:24 AM
micromass

1 
45,427 
I'm currently in first year calculus, and I'm having trouble remembering all my trig for use in derivatives.
I have...

Oct2609 05:57 PM
lurflurf

2 
1,805 
given a function g(x) so the integral \int_{\infty}^{\infty}dx g(x) exists
could we find a complex valued...

Oct2609 01:26 PM
g_edgar

2 
1,258 
I am trying to see why exactly the momentum eignenstates for a free particle are orthogonal. Simply enough, one gets:...

Oct2609 01:20 PM
g_edgar

1 
2,246 
i have a relation z4 + x2z = x5 ,
now i differenciate it implictly to find dz/dx ,
but if we observe carefully we...

Oct2609 12:06 PM
HallsofIvy

2 
771 
Hi
My book defines onetoone mapping as
A mapping T is onetoone on D* if for (u,v) and (u',v') ∈ D*,
T(u,v)...

Oct2609 12:01 PM
HallsofIvy

6 
2,129 
I am having a hard time understanding the difference between poles and zeros, and simple poles versus removable poles....

Oct2609 10:59 AM
skook

5 
5,237 
Hey Folks, first post here,
I'm having significant difficulty understanding how to create an analytic continuation...

Oct2609 10:45 AM
skook

1 
759 
A car is traveling at 40.7 mi/h on a horizontal highway.
The acceleration of gravity is 9.8 m/s/s.
If the...

Oct2509 08:11 PM
kza62

5 
1,891 
are there lots of examples of nonmeasurable sets? the one that seems to be in most textbooks involves a type of...

Oct2509 06:59 PM
g_edgar

1 
1,145 
I am trying to follow along with the text's derivation of the Bernoulli equation and I am a little confused with a...

Oct2509 03:26 PM
Saladsamurai

4 
3,895 
Hey Guys,
I've been banging my head with this one for a few days now. I've done (a) and (b) but I'm yet to do (c)...

Oct2509 02:58 PM
Clef

7 
903 
I understand the concepts of domain and range/image, but can somebody explain to me what the codomain of a function...

Oct2509 02:51 PM
Hurkyl

2 
2,068 
In a sinusoidal function...suppose the value of δ is very large...then as x approaches any a, the value of f(x) might...

Oct2509 01:53 PM
emyt

8 
5,250 
I am in a 12th grade Physics class and in the beginning of the year, we learned the calculus based equation: /h. I...

Oct2509 11:19 AM
emyt

6 
8,557 
Basically, I have used microwaves in a wave guide to measure the width of the guide via standing waves. This led me to...

Oct2509 07:15 AM
Zorba

1 
681 
:confused:
hi, this will be my first post on the forum, although i in the past have looked over it!
um, this is...

Oct2409 11:51 PM
mbsl5

12 
8,239 
Just spent the last few months working on an undergrad course in complex analysis and have a couple of things that...

Oct2409 02:52 PM
skook

2 
2,599 
Hi, I'm working on a related rates problem, and I need to find the derivative of the volume of a cone.
So the...

Oct2409 01:41 PM
Flieger

10 
58,866 
Dear all,
I am recently exposed to the distribution theory. Why are "test" functions called "test" functions? What...

Oct2409 01:02 PM
Hurkyl

6 
1,060 
I'm having a hard time creating a tidy equation to solve this seemingly simple problem.
I have two points in...

Oct2309 11:03 AM
Verox

2 
1,768 
Sorry but i have a question regarding Laplace Equation,
say if a potential function P represents the inverse square...

Oct2309 07:30 AM
danong

2 
2,217 
Hi,
I have a mixed integer nonlinear model and I need to determine convexity or nonconvexity.
the objective...

Oct2309 05:05 AM
mousemouse

0 
594 
Fekete's Lemma states that if {a_n} is a real sequence and a_(m + n) <= a_m + a_n, then one of the following two...

Oct2309 02:06 AM
foxjwill

1 
3,291 
I know that for any two real sequences x_n and y_n, we have
\liminf_{n\to \infty} x_n + \liminf_{n\to \infty} y_n...

Oct2209 11:38 AM
AxiomOfChoice

2 
2,450 
I've recently read about Null Identities of vector analysis.
I'm having a problem in understanding what is it by...

Oct2209 11:35 AM
danong

4 
762 
I was wondering that the continuity of a function is an actually function of these δs...if they are large they might...

Oct2209 06:27 AM
HallsofIvy

32 
2,832 
Hello,
I am in my 3rd semester at college, I have take Calculus 1,2,3 (derivatives, integrals, vector calculus) and...

Oct2109 03:44 PM
mikeph

1 
859 
Is any one aware of the verity of the following inequality
<= F(1, (p1)/2; (p+2)/2; x)
where F(a, b; c; x) is...

Oct2109 11:54 AM
Andrew Magyar

0 
643 
The integral of ln(1x) is (1x)ln(1x)x, when 0<=x<=1.
So for example:
\int_{0}^{1} ln (1x)dx=...

Oct2109 11:10 AM
HallsofIvy

1 
2,398 
I'm trying to show that any uncountable set has a countable subset.
First, let me point out that the distinction...

Oct2009 10:35 PM
VeeEight

1 
588 
Hi, in gamma function gamma(1/2)=factorial(1/2)=(pi)^(1/2) but how did it? i don't understand that because the...

Oct2009 06:54 PM
lurflurf

12 
3,944 
I have to prove from the definiton of the limit of a function that the limit of f(x) as x tends to 2 equlas 3, given...

Oct2009 01:43 PM
Juggler123

7 
997 
I have a question regarding fluid streamline vector,
why is it different from the usual position vector when you take...

Oct2009 10:14 AM
arildno

3 
1,229 
I'm trying to remember a limit I was supposed to have memorized for calc. Is this right?
limx>0 /x = 0
...

Oct1909 06:06 PM
lurflurf

2 
1,010 
Could anyone prove or disprove the following inequality:
x_{p}\leqx_{p'} for all x\in\mathbb{R}^{n} if...

Oct1909 04:19 PM
trambolin

3 
651 
According to supremum and infimum principle,
nonempty set A={xx\inQ,x2<2} is upper bounded, so it should have a...

Oct1909 02:49 PM
HallsofIvy

5 
2,113 
Hi everyone
I've been dealing with a rather difficult (at least for me) integration problem which I am not able to...

Oct1909 08:52 AM
g_edgar

2 
875 
Please compute M'(t) and M''(t)?
M(t) =
(pe^t)^r

(1qe^t)^r

Oct1909 08:52 AM
arildno

5 
742 
I have a problem understanding the following:
I should calculate the Fourier transform of a product of three...

Oct1809 04:50 PM
parton

2 
928 
Hi, I have a question about infinite limit of complex integral.
Problem: Consider the function ln(1+\frac{a}{z^{n}})...

Oct1809 04:13 PM
riquelme

0 
761 