Question Number 59276 by Mr X pcx last updated on 07/May/19
$${find}\:{the}\:{value}\:{of}\:\:\sum_{{n}=\mathrm{2}} ^{\infty} \:\:\frac{{n}}{\left({n}ā\mathrm{1}\right)^{\mathrm{3}} \left({n}+\mathrm{1}\right)^{\mathrm{3}} } \\ $$
find-the-value-of-n-2-n-n-1-3-n-1-3-