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k-1-k-2-k-




Question Number 77528 by Mohamed Amine Bouguezzoul last updated on 07/Jan/20
Σ_(k=1) ^∞ (k^α /2^k )=?
$$\underset{{k}=\mathrm{1}} {\overset{\infty} {\sum}}\frac{{k}^{\alpha} }{\mathrm{2}^{{k}} }=? \\ $$

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