calculate-n-1-1-n-3-5-n-

Question Number 146194 by mathmax by abdo last updated on 11/Jul/21

calculate \sum_{n = 1}^{\infty} \frac{1}{n^{3} 5^{n}}

Answered by qaz last updated on 12/Jul/21

\sum_{1 ⩽ n ⩽ \infty} \frac{1}{n^{3} 5^{n}} = {Li}_{3} (\frac{1}{5})

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