Question Number 138842 by peter frank last updated on 18/Apr/21
$${Find}\:{the}\:{sum}\:{to}\:{infinity} \\ $$$$\mathrm{1}+\frac{\mathrm{3}{x}}{\mathrm{1}!}+\frac{\mathrm{5}{x}^{\mathrm{2}} }{\mathrm{2}!}+\frac{\mathrm{7}{x}^{\mathrm{3}} }{\mathrm{3}!}+.. \\ $$