Question

Prove that sum of the series
$\frac{1^{3} }{1} + \frac{1^{3} + 2^{3} }{1+3} + \frac{1^{3} + 2^{3} +3^{n} } {1+3+5} + ..... infintiy = \frac{n(2n^{2} + 9n + 13) }{24}$

Answer 1

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Answer 2

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