Post'em.
SQT
Bentley Anderson
Other urls found in this thread:
en.wikipedia.org
pastebin.com
oeis.org
twitter.com
Camden Johnson
Did I fucked up? Proof of orthogonality of plane waves
Levi Bennett
Prove that n^5 - 5n^3 + 4n is divisible by 120.
I tried factoring it and I got n(n+1)(n-1)(n+2)(n-2) but I still have no idea why it's divisible by 120. Any help?
Luke Rogers
how do i implement a hashtable using only arrays?
Jack Evans
Put arrays in your array.
Robert Evans
n(n+1)(n-1)(n+2)(n-2)
Put it in order:
(n-2)(n-1)n(n+1)(n+2)
Now, it's supposed to be n> 2 otherwise it is impossible.
See that for 3 we have:
(1)(2)3(4)(5) = 6*20 = 120.
For 4 we have:
(2)(3)4(5)(6) = 6*120 = 720
For 5 we have:
(3)(4)5(6)(7). As you can see by now, you'll always have a multiple of 5, 3 and 8(a multiple of 2 and 4 every time). So it'll always divide by 120.
Angel Cook
Why is it impossible for n to be 0, 1 or 2? Isn't 0 divisible by 120?
Justin Wilson
...
Kayden Bell
> Isn't 0 divisible by 120?
yes it is
Xavier Morgan
If you increase an objects energy, you increase it's gravitational pull. But kinetic energy is just relative, so how does the universe ensure that me moving towards another galaxy wont collapse it? Or is the increase in kinetic energy(and thus gravity) perfectly cancelled with time dialation?
Apologies if i didn't explain correctly, this isn't my field of expertise.