Find the first six terms of the sequence.a1 = 1, an = 2an-1

A. 1, 3, 6, 9, 12, 15
B. 1, 2, 4, 8, 16, 32
C. 0, 3, 3, 6, 9, 12
D. 2, 4, 8, 16, 32, 64


Answer: B

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