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Geometric Sequences
medium
0:00.0
If
S
n
=
3
n
−
1
S_n = 3^n - 1
S
n
=
3
n
−
1
, find the common ratio
r
r
r
.
A
3
3
3
B
2
2
2
C
1
1
1
D
4
4
4
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