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Infinite Series
hard
0:00.0
Evaluate
∑
n
=
1
∞
(
1
2
)
n
−
1
\sum_{n=1}^{\infty} (\frac{1}{2})^{n-1}
∑
n
=
1
∞
(
2
1
)
n
−
1
.
A
2
2
2
B
1
1
1
C
4
4
4
D
0.5
0.5
0.5
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