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