Analysis

[kjn]

Hello friends ,can you help me to find the sum of the series from n=1 to infinity (n^2)/(n!)
and the same for the series (n^2)/(n!)^2 where n varies from 1 to infinity

[tommy1729]

first and second derivative , finite sums and differences.

list of standard functions.

thats almost all you need.

[kjn]

thanks .