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Single Variable Calculus

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Radius of Convergence of Power Series I

SVCALC-IIVDJN

Find the radius of convergence of the power series:

$$\sum_{n=0}^\infty\frac{2^n}{n!}x^n $$

A

$0$

B

$\cfrac{1}{e}$

C

$\cfrac{1}{2}$

D

$2$

E

$\infty$