Question Number 140576 by SOMEDAVONG last updated on 09/May/21
$$\mathrm{Find}\:\mathrm{the}\:\mathrm{sum}\:\mathrm{of}\underset{\mathrm{n}=\mathrm{1}} {\overset{+\propto} {\sum}}\frac{\mathrm{2}^{\mathrm{n}} }{\mathrm{n}^{\mathrm{3}} }=? \\ $$
Answered by Dwaipayan Shikari last updated on 09/May/21
$${Li}_{\mathrm{3}} \left(\mathrm{2}\right) \\ $$