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Solve the Problem 2,1,12,14,, find an2,1 , \frac { 1 } { 2 } , \frac { 1 } { 4 } , \ldots , \text { find } a _ { n }

Question 16

Multiple Choice

Solve the problem.
-For the geometric sequence 2, 1, 2,1,12,14,, find an2,1 , \frac { 1 } { 2 } , \frac { 1 } { 4 } , \ldots , \text { find } a _ { n } . A) an=21na _ { n } = 2 ^ { 1 - n }
B) an=(12) 1na _ { n } = \left( \frac { 1 } { 2 } \right) ^ { 1 - n }
C) an=2n2a _ { n } = 2 ^ { n - 2 }
D) an=(12) n2a _ { n } = \left( \frac { 1 } { 2 } \right) ^ { n - 2 }

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