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 = -2
A. a5 = -56; an = 7 ? (-2)n
B. a5 = 112; an = 7 ? (-2)n
C. a5 = -56; an = 7 ? (-2)n-1
D. a5 = 112; an = 7 ? (-2)n-1
Answer: D
Mathematics
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