Find the first term and the common ratio of the geometric sequence.56, 28, 14, 7, 3.5, . . .
A. a1 = 56, r = 3.5
B. a1 = 0.5, r = 2
C. a1 = 0.5, r = -0.5
D. a1 = 56, r = 0.5
Answer: D
Mathematics
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