Find the nth term an of the geometric sequence.1.4, -1.12, 0.896, -0.7168, . . .
A. an = -1.4(0.8)n-1
B. an = 1.4(-0.8)n
C. an = -1.4(0.08)n
D. an = 1.4(-0.8)n-1
Answer: D
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