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Power Series
medium
0:00.0
Calculate
∑
n
=
0
∞
2
n
n
!
\sum_{n=0}^{\infty} \frac{2^n}{n!}
∑
n
=
0
∞
n
!
2
n
.
A
e
e
e
B
e
2
e^2
e
2
C
2
e
2e
2
e
D
e
4
e^4
e
4
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