Find the common difference d and the nth term an of the arithmetic sequence with the specified terms. 4th term is 20; 6th term is 38
A. d = 9; an = 9n - 7
B. d = 7; an = 7n + 16
C. d = 2; an = 2n + 9
D. d = 9; an = 9n - 16
Answer: D
Mathematics
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