- #1
McFlea
- 2
- 0
Hi there, I am having some problems with figuring out these two questions I have been given out for homework. Both of these make no sense to me and I can't seem to prove them, can anyone give me an insight to them?
1+5+9+ ... + (4n+1)=(n+1)(2n+1) for each positive integer n
and
2^2n - 1 is divisible by 3 for n = 1,2,3,...
any ideas?
Thanks.
1+5+9+ ... + (4n+1)=(n+1)(2n+1) for each positive integer n
and
2^2n - 1 is divisible by 3 for n = 1,2,3,...
any ideas?
Thanks.