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Geometric Sequences
hard
0:00.0
What is
r
r
r
for
1
,
−
3
,
9
1, -3, 9
1
,
−
3
,
9
?
A
−
3
-3
−
3
B
3
3
3
C
−
1
/
3
-1/3
−
1/3
D
None
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