Write a formula for the nth term of the arithmetic sequence. Use the formula to find the 20th term of the sequence.2, 8, 14, 20, 26, . . .
A. an = 6n - 4; a20 = 116
B. an = 6n - 2; a20 = 118
C. an = 4n - 6; a20 = 74
D. an = 4n - 2; a20 = 78
Answer: A
Mathematics
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