calculate-S-n-k-0-n-k-C-n-k-2-

Question Number 64652 by mathmax by abdo last updated on 20/Jul/19

c a l c u l a t e S_{n} = \sum_{k = 0}^{n} k {(C_{n}^{k})}^{2}

Commented by mr W last updated on 21/Jul/19

p l e a s e t e l l y o u r s o l u t i o n, t h a n k s!

Commented by mathmax by abdo last updated on 21/Jul/19

i h a v e n t t h e s o l u t i o n f o r t h i s s i r g i v e m e t i m e s i r i w i l l t r y \dots