Determine Whether the Series Is Convergent or Divergent $$\sum _ { n = 1 } ^ { \infty } \frac { 9 ^ { n } } { n ! n }$$

Short Answer

Determine whether the series is convergent or divergent.
$$\sum _ { n = 1 } ^ { \infty } \frac { 9 ^ { n } } { n ! n }$$