Question

Find The sum to The series 1^2 + 2^2 + 3^2..........?

Answer 1

@experimentX

Answer 2

don't bother ... the series diverges.
for fixed n you have formula
\[ 1^2 + 2^2 + ... +n^2 = {n(n+1)(2n+1) \over 6}\]

Answer 3

http://mathoverflow.net/questions/8846/proofs-without-words/69756#69756

Answer 4

thxxxx