Question Number 92555 by arcana last updated on 07/May/20
$$\underset{{n}=\mathrm{1}} {\overset{\infty} {\sum}}\mathrm{1}/{n}^{\mathrm{2}} =\pi^{\mathrm{2}} /\mathrm{6} \\ $$
Commented by abdomathmax last updated on 08/May/20
$${this}\:{Q}\:{is}\:{done}\:{see}\:{the}\:{platform}… \\ $$
Commented by arcana last updated on 08/May/20
$${how}\:{I}\:{find}\:{the}\:{question}? \\ $$
Commented by Prithwish Sen 1 last updated on 08/May/20
https://youtu.be/WL_Yzbo1ha4
Commented by Prithwish Sen 1 last updated on 08/May/20
$$\mathrm{Sir}\:\mathrm{you}\:\mathrm{can}\:\mathrm{watch}\:\mathrm{this}\:\mathrm{very}\:\mathrm{beautiful}\:\mathrm{matheloger} \\ $$$$\mathrm{vedio}\:\mathrm{on}\:\mathrm{this}\:\mathrm{topic}. \\ $$
Commented by arcana last updated on 09/May/20
$$\mathrm{thanks}.\:\mathrm{some}\:\mathrm{solution}\:\mathrm{using}\:\mathrm{parseval}\: \\ $$$$\mathrm{identity}? \\ $$