Question Number 26572 by abdo imad last updated on 26/Dec/17
$${find}\:{the}\:{radius}\:{ofconvergence}\:{for}\:{the}\:{serie} \\ $$$$\sum_{{n}\geqslant\mathrm{0}} \left(\:{e}^{\sqrt{{n}+\mathrm{1}}} −{e}^{\sqrt{{n}}} \right){z}^{{n}} \:\:\:\:\:\:{with}\:{z}\:{from}\:\mathbb{C} \\ $$$$ \\ $$