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

Feb2313 09:23 AM
micromass

1 
38,946 
Hey,I am making an app that counts probabilities in c++(win32){for those who knows}.
I have found three formulas of...

Jan914 04:08 PM
Nugatory

5 
486 
I have a series that takes steps of '2' which requires an operation starting from n=1 to do the following,
@n=1 ...

Jan914 01:49 PM
mesa

5 
608 
Hi!
I've encountered the series below:
\sum_{l=0}^{k1} (r+l)^j (r+lk)^i
where r, k, i, j are positive...

Jan914 01:47 PM
mfb

1 
462 
I am trying to figure out how to convert a username into a number between 10 to 99.
It would be preferable that a...

Jan914 03:09 AM
Borek

3 
531 
Hey all
Is there a clever, and elegant way to change a sinc^2 function so that its side lobes will be larger?

Jan914 12:36 AM
maajdl

1 
450 
Hi Guys, sorry in advance if I am posting this in the wrong place.
I need to find the formula for calculating the...

Jan814 10:19 PM
Mentallic

19 
1,032 
Is this a correct conclusion from these three facts ? One in five cigarette smokers dies from smoking.
There are...

Jan814 07:08 AM
rcgldr

3 
482 
Hi,
Apologises if I have submitted this issue into the wrong Math forum. However, I was wondering if anybody could...

Jan814 03:35 AM
mysearch

2 
575 
In these pictures in lower right corner is a sphere that is changing its shape. I wonder how I can build this sphere ?...

Jan714 12:38 PM
ryt

0 
445 
update  changing the problem statement:
You have a jar filled with 66 white, and 6 unique balls: 1 red, 1 blue, 1...

Jan614 02:47 PM
Office_Shredder

5 
556 
Hi. Are there any examples of functions that react to themselves? If so, how are they expressed algebraically? Any...

Jan514 04:16 PM
Evo

5 
541 
I am studying complex numbers and, hard as I try, I cannot see great difference between them and the conjugate numbers...

Jan514 06:53 AM
thelema418

12 
1,152 
Hello guys, I hope you all have happy holiday!
This question crops up to my mind often when I read through threads...

Jan514 02:29 AM
thelema418

4 
656 
Hello,
simple question.
My textbook (Bostock and Chandler  Pure Mathematics 1) says something that really...

Jan514 01:24 AM
thelema418

5 
535 
Hi all,
Would a heading of 330 degrees be equivalent to a standard angle measurement of 30 degrees? I'm used to...

Jan414 08:37 PM
Medgirl314

3 
538 
Hi all,
I've got a question that came up while while carrying a sofa up the stairs. Is there a way that one could...

Jan414 07:33 AM
phinds

1 
498 
Hi all,
How can I calculate the minimum distance between the perimeter of a disk in 3d space and a point above the...

Jan414 06:03 AM
D H

16 
807 
Euclid's Elements start with five Postulates, including the fifth one, the famous Parallel Postulate. Less well known,...

Jan414 01:14 AM
Simon Bridge

3 
525 
So I was thinking the other day why is kmph appear bigger than mph in conversions. I thought sense km was a bigger...

Jan314 08:10 PM
brycenrg

1 
471 
Hi. I don't understand how a solution to a linear system is obtained (for example geometrically; don't consider the...

Jan314 06:15 PM
1MileCrash

2 
534 
The title pretty much says it all, does anyone know infinite series summations that are equal to 1/5 or 1/7?

Jan314 01:01 PM
mesa

17 
921 
How does a random number generator work ?
What is the usage of it ?

Jan214 06:15 AM
jbriggs444

3 
513 
trust me this is trivial...
As a kid I had a teacher fond of asking if numbers were prime. Of course at the time I...

Jan114 11:40 PM
SteamKing

6 
612 
I want you note this comparation:
\\ \sin(\theta)=\sin(\omega t)=\sin(2\pi f t)=\sin\left(\frac{2\pi t}{T}\right) \\...

Jan114 10:49 AM
Jhenrique

4 
592 
To quote Goursat:
Would somebody mind developing some intuition for this statement, along with an example or four...

Jan114 10:35 AM
bolbteppa

0 
396 
To bring odd number with a die,is 50%.
If I play with the die two times,how possibilities I have to bring odd number?

Jan114 07:55 AM
HallsofIvy

5 
469 
I have an equation, where acceleration is affected by a driving power and air resistance. The acceleration is given...

Dec3113 10:25 PM
NascentOxygen

7 
633 
I would like to know what the size of my monitor would appear to be if I were to move further away from it. It is a...

Dec3113 03:28 PM
Stephen Tashi

8 
915 
When you have a function of this form: y = x^{5}  4x^{3}
Is it possible to solve for x (isolate x to 1 side)?
...

Dec3113 01:35 PM
Jhenrique

27 
1,203 
In problems that ask you to "show" something (e.g. "show that the formula/equation for ____ is _____") , it it...

Dec3113 07:57 AM
HallsofIvy

5 
648 
In order for an equation to be a function, it has to pass the vertical line test.
A circle is not a function...

Dec3013 11:27 PM
Shyan

7 
606 
Hey everyone, I was just playing around with factorial expansion and after grouping some terms I noticed a pattern for...

Dec3013 03:08 PM
hddd123456789

3 
679 
Hi,
It's surprising how little information is available on this topic, considering it seems like such a fundamental...

Dec3013 02:45 PM
CraigH

8 
1,280 
Is anyone here any good with MATLAB? I could do with some help.
I want to use the ellipticF function as shown here....

Dec3013 10:54 AM
CraigH

0 
557 
Given parametric equations:
t^{5}4t^{3}] and t^{2}]
Since polynomials can only be solved up to the 4th...

Dec3013 10:15 AM
jbriggs444

4 
536 
This is just a curiosity from my part: Has anyone know the proof of "Intersection of one internal angle bisector and...

Dec3013 01:04 AM
adjacent

1 
485 
Hellow! I have searched for some theory about linear system in polar coordinates, unfortunately, I not found...

Dec2913 10:06 PM
Stephen Tashi

3 
463 
What is the general method for writing Cartesian equations as parametric equations?
For something as simple as...

Dec2913 06:20 PM
Simon Bridge

3 
602 
Hi all,
Is there a nice closed form for the following series?
\sum_{k=0}^n x^{k^2}
Even a decently tight...

Dec2913 03:39 AM
lasindi

2 
732 
Hi all,
I was wondering if anyone could give me a hand in rearranging the following formulae to make v the subject?...

Dec2813 07:04 PM
Mark44

3 
446 