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Geometric Sequences
hard
0:00.0
Find
a
2
a_2
a
2
if
a
1
=
1
,
r
=
1
/
2
a_1=1, r=1/2
a
1
=
1
,
r
=
1/2
.
A
0.5
0.5
0.5
B
2
2
2
C
1
1
1
D
None
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