Question Number 51847 by hassentimol last updated on 31/Dec/18
Commented by hassentimol last updated on 31/Dec/18
$$\mathrm{Can}\:\mathrm{you}\:\mathrm{help}\:\mathrm{me}\:\mathrm{to}\:\mathrm{prove}\:\mathrm{the}\:\mathrm{above}\:\mathrm{equation}\:? \\ $$