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

Feb2313 09:23 AM
micromass

1 
38,941 
I do really well if I have one form of arithmetic like addition, or subtraction. But as we all know math doesn't work...

Jun813 03:27 AM
lurflurf

34 
4,012 
For reference, let \mathbb N^{\infty} denote the set of all \inftytuples of the form (n_{1}, n_{2}, \dots) with...

Aug3111 12:44 PM
micromass

48 
4,010 
Hi,I m trying to find out,what is imaginary unit/number.How to imagine it.I was reading many articles and...

Jul2312 11:46 AM
Number Nine

36 
4,005 
hi all,
i was studying modulus when i came across this mod(xy) = modx mod y
we consider 3 cases
whereby both...

Jun3008 02:23 PM
HallsofIvy

5 
4,003 
x^4+y^4+z^4+(4x^2)*(y^2)*(z^2)34=0
ive tried all sorts of things factoring, algebraic manipulation ect. but i dont...

Aug2109 03:29 PM
Storm Butler

7 
4,003 
What is the meaning of a pathological function?

Jan1707 01:03 PM
arildno

12 
4,002 
Let's say you know x1, x2 and y1=y(x1), y2=y(x2) and
gradients dy/dx at x1 and dy/dx at x2.
That's 4 knowns. ...

Apr2807 05:32 AM
christianjb

1 
4,002 
one (and perhaps the only) example is:2^4=4^2
what more examples are there?

Jul2103 02:05 PM
suffian

15 
4,000 
Hi,
Very general question, I never really covered this.
Say I have ten data points in 2D space and I need to...

Sep2810 01:46 PM
Hurkyl

14 
4,000 
Hey,
Not sure if this is in the right place, move if necessary.
So, I know about SUVATs, and nonconstant...

Jul609 01:23 AM
Mentallic

16 
3,999 
Hi everyone,
I'm designing a particular algorithm and part of it requires to check if a given Matrix is invertible...

Jun3010 06:02 AM
Gib Z

3 
3,999 
My differential geomtry professor once told me that with all his 30+ years experience in research in differential...

Feb2507 12:58 PM
andytoh

30 
3,993 
Hello everyone, I do not understand how:: e raised to ln of x = x ?
this notation might make more sense:: e^ln...

May407 11:07 AM
uart

11 
3,993 
Hi all, ok there are 3 piles containing objects; Pile A, Pile B and Pile C.
Let the Nimsum of all 3 piles be...

Dec2606 11:34 PM
Werg22

3 
3,991 
Hi everyone.
I tried solving these questions but cant seems to get anywhere. I am not used to questions like these...

May3104 01:58 PM
AKG

4 
3,990 
I have a door lever which has a 90 deg. bend. I need to calculate the length that this lever would have to be if it...

Oct2609 03:49 PM
camacru

3 
3,990 
Hello, I got pointed to this forum by OfficeShreder. I have a question I've been puzzling myself over for a while.
...

Nov2106 12:30 AM
shmoe

8 
3,989 
I'm sure I've seen it...I've searched under "typing exponents" , "how exponents" and "superscript" and can't come up...

Nov1003 10:17 AM
Guybrush Threepwood

3 
3,988 
I'm aiming to calculate ln(x) numerically. I'm using the following procedure for this:
1) If x is greater or equal to...

Jan2611 04:40 PM
hotvette

12 
3,985 
here there are Exercises on Partial Derivatives:...

Aug803 01:53 AM
futz

2 
3,984 
I'm not really sure which forum this is appropriate for, so I'll put it here and hope someone can help! I can't find...

Jan2306 03:24 AM
Nylex

0 
3,984 
if sinh(y)=x, then, show that cosh(y)=sqrt(1+x^2)
I know how to prove but i have difficult in choosing the signs.
...

Sep2507 11:43 PM
cks

8 
3,981 
What's the general rule for constructing such graphs? I mean actually drawing it on paper.

Jun1609 10:23 AM
benorin

1 
3,981 
A topological space is a set X together with T, a collection of subsets of X, satisfying the following axioms:
1.The...

May2509 12:05 AM
maze

9 
3,980 
What happens if you have to take the arccos of a number greater than 1 or less than 1.
I know from a right...

Sep511 03:12 PM
D H

7 
3,977 
Hi all !
I came across an article (link: http://www.math.toronto.edu/mathnet/answers/infinity.html#2)
The...

Jul1504 12:01 PM
quartodeciman

33 
3,976 
I love doing proofs, but hate doing computational questions. If I become very good with proofs but remain just soso...

Feb111 06:11 PM
mathwonk

21 
3,976 
How one can find the solution to x^y+y^x=100 Where x,y belong to integers?

Jan904 01:19 AM
NateTG

5 
3,974 
Hello, I need your help please?
It might seem obvious to you but I can't seem to get my head around how to solve...

Aug1303 04:33 PM
suffian

11 
3,971 
Hello, my problem is:
Let Q(t) = 8(0.87)^t
Find the annual and daily growth rate.
Can anyone tell me how...

Oct2904 01:36 AM
vsage

5 
3,971 
definitely you can assume the premis and arrive at a truth and then consider your theorem truth only if the way from...

Jun2708 11:40 PM
DeaconJohn

54 
3,970 
Is this method good for analyzing a pulse?
Why is the averaging of the spectra good for noise cleaning?
What's the...

Jun1010 04:17 AM
mediocre

4 
3,969 
Find the relative extrema of f(x)=3xx^2.
Normally you solve f'(x)=0 to find the critical points, in that case we...

Jan2410 06:18 AM
HallsofIvy

4 
3,966 
One guy advanced and asked me the question with an intention to judge my skill  " What is the value of x , if x2=4 "...

Aug311 12:16 PM
SteveL27

24 
3,966 
I know that Euler is pronounced Oiler, and Galois is GaleWah. Can anyone try to write phonetically Stieltjes,...

Dec1108 02:48 PM
matticus

3 
3,963 
I have the function:
x(\phi) = \left~\textrm{mod}~72~000
and I'm wondering how to invert it in order to get ...

Jun1211 10:11 PM
cepheid

33 
3,962 
As we have seen some mathematical sign lately in this group, because I put you in the drawing of the general sign of...

Nov607 03:42 AM
Integral

37 
3,961 
hi, I'm stuck and I cant seem to find a simple solution to questions regarding how to find the centre of mass of a...

May2610 12:07 PM
kolomsg

2 
3,961 
I'm reading Gamelin's Complex Analysis book, and he talks about f(z) being analytic if it is continuously...

Oct509 07:06 PM
HallsofIvy

1 
3,960 
Hi, how can I work out the relationship between percentages of a whole, when one of those percentages changes? I'm...

Sep810 10:19 AM
Thetom

27 
3,959 