Σ m=1,∞ Σ n=1,∞ m^2n/3^m(n.3^m + m.3^n) =

Question

\(\sum\limits_{m = 1}^\infty \sum\limits_{n =1}^\infty \frac{m^2n}{3^m(n.3^m + m.3^n)}=\)

a. 16/9

b. 9/16 

 c. 1

d. none of these

Answer 1

Correct option is d. none of these