Determine Whether the Series Converges or Diverges $\sum _ { n = 1 } ^ { \infty } ( - 1 ) ^ { n } n \sin \left( \frac { \pi } { 9 n } \right)$

question 121

Short Answer

Determine whether the series converges or diverges. $\sum _ { n = 1 } ^ { \infty } ( - 1 ) ^ { n } n \sin \left( \frac { \pi } { 9 n } \right)$

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