Hey all, any help proving the following summation would be greatly appreciated!
Σ from j=1 to k of j^2 = k(k+1)(2k+1) / 6
Thank you!
See...
http://www.mathhelpforum.com/math-he...la-172620.html
... taking into account that is $\displaystyle \displaystyle S_{1,n}= \frac{n\ (n+1)}{2}$ ...
Kind regards
$\displaystyle \chi$ $\displaystyle \sigma$