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Question-86140




Question Number 86140 by Wepa last updated on 27/Mar/20
Commented by Prithwish Sen 1 last updated on 27/Mar/20
((1/2))^(2020) 𝚺_(k=2) ^(2020) k.2^k    please check.
$$\left(\frac{\mathrm{1}}{\mathrm{2}}\right)^{\mathrm{2020}} \underset{\boldsymbol{\mathrm{k}}=\mathrm{2}} {\overset{\mathrm{2020}} {\boldsymbol{\sum}}\mathrm{k}}.\mathrm{2}^{\boldsymbol{\mathrm{k}}} \:\:\:\boldsymbol{\mathrm{please}}\:\boldsymbol{\mathrm{check}}. \\ $$

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