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Geometric Sequences
easy
0:00.0
What is
a
2
a_2
a
2
if
a
1
=
4
a_1=4
a
1
=
4
and
r
=
−
2
r=-2
r
=
−
2
?
A
2
2
2
B
−
2
-2
−
2
C
−
8
-8
−
8
D
8
8
8
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