Find anand a6 for the following arithmetic sequence.2, 6, 10, 14, 18
A. an = 4n - 1; a6 = 23
B. an = 2(4)n-1; a6 = 8
C. an = 2n - 4; a6 = 8
D. an = 2(2n - 1); a6 = 22
Answer: D
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