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Foundations
hard
0:00.0
Evaluate
∑
k
=
1
∞
(
1
2
)
k
\sum_{k=1}^{\infty} (\frac{1}{2})^k
∑
k
=
1
∞
(
2
1
)
k
.
A
1
1
1
B
1.5
1.5
1.5
C
2
2
2
D
0.5
0.5
0.5
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