Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.a = 
; r = 
A. a5 = 3
, an = 3n/2-1
B. a5 = 243, an = 3n
C. a5 = 9
, an = 3n/2
D. a5 = 81
, an = 3n-1/2
Answer: C
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