Question Number 16904 by richard last updated on 28/Jun/17
$${Proove}\:{that} \\ $$$$\underset{{n}=\mathrm{1}} {\overset{\infty} {\sum}}\frac{{m}^{\mathrm{2}} }{{xm}}=\underset{{n}=\mathrm{1}} {\overset{\infty} {\sum}}\frac{{xm}}{{x}^{\mathrm{2}} } \\ $$
Commented by Tinkutara last updated on 28/Jun/17
$$\mathrm{Where}\:\mathrm{is}\:{n}? \\ $$