Question Number 123115 by 676597498 last updated on 23/Nov/20
$$\underset{{n}=\mathrm{1}} {\overset{\infty} {\sum}}\mathrm{2}^{{n}} =? \\ $$
Commented by Dwaipayan Shikari last updated on 23/Nov/20
$${It}\:{diverges}\:\rightarrow\infty\:\:\:\:\:{as}\:\mid{a}\mid=\mathrm{2} \\ $$$$ \\ $$