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9
2005 Calculus #9: A sum!
2005 Calculus #9: A sum!
Source:
April 29, 2013
calculus
trigonometry
Problem Statement
Compute
∑
k
=
0
∞
4
(
4
k
)
!
.
\displaystyle\sum_{k=0}^{\infty} \dfrac {4}{(4k)!}.
k
=
0
∑
∞
(
4
k
)!
4
.
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