Previous in Relation and Functions Next in Relation and Functions
Question Number 30549 by abdo imad last updated on 23/Feb/18
$${let}\:{S}\left({x}\right)=\:\sum_{{n}=\mathrm{0}} ^{\infty} \:\:\frac{{x}^{\mathrm{3}{n}} }{\left(\mathrm{3}{n}\right)!}\:\:{find}\:{S}\left({x}\right). \\ $$