Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.a = -7; r = -3
A. a5 = 189; an = -7 ? (-3)n
B. a5 = 189; an = -7 ? (-3)n-1
C. a5 = -567; an = -7 ? (-3)n-1
D. a5 = -567; an = -7 ? (-3)n
Answer: C
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