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Geometric Sequences
easy
0:00.0
Find the first term if
a
n
=
2
⋅
(
−
1
)
n
a_n = 2 \cdot (-1)^n
a
n
=
2
⋅
(
−
1
)
n
.
A
2
B
-2
C
1
D
0
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