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Geometric Sequences
hard
0:00.0
Find
a
3
a_3
a
3
if
a
n
=
2
n
+
1
a_n = 2^{n+1}
a
n
=
2
n
+
1
.
A
8
8
8
B
32
32
32
C
4
4
4
D
16
16
16
Submit Answer