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OpenStudy (anonymous):
9th term in the geometric sequence 4, 12, 36, ...
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OpenStudy (anonymous):
\[X_{9}=ar ^{n-1}\] a=the first term r=the common ratio between terms \[X_{9}=4(3)^{9-1}\]\[X_{9}=12^{8}\]\[X_{9}=429981696\]
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