Find the first term and the common ratio of the geometric sequence.1.4, -0.7, 0.35, -0.175, . . .
A. a1 = 1.4, r = -0.5
B. a1 = -0.5, r = -0.05
C. a1 = 0.5, r = 0.05
D. a1 = 1.4, r = 0.5
Answer: A
Mathematics
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