Question

Another one @ganeshie8

Answer 1

\[\sum_{n=1}^{\infty}\frac{ 1 }{ \sum_{n=1}^{\infty} k^3}\]

Answer 2

the index in denominator is \(k\) right ?

Answer 3

\[\sum_{n=1}^{\infty}\frac{ 1 }{ \sum_{\color{red}{k}=1}^{\infty} k^3}\]

Answer 4

YUP SRY