Find an for the given geometric sequence.a1 = 6, r = 5
A. an = 5(6)n-1
B. an = 6(5)n-1
C. an = 6(5)n
D. an = 5(6)n
Answer: B
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Evaluate.(-1)15
A. 15 B. -15 C. 1 D. -1
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