Find the Interval of Convergence For $\sum _ { n = 1 } ^ { \infty } \frac { x ^ { n } } { n 2 ^ { n } }$

question 306

Essay

Find the interval of convergence for $\sum _ { n = 1 } ^ { \infty } \frac { x ^ { n } } { n 2 ^ { n } }$ .

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