Question

Give the simple formula for the nth term of the following arithmetic sequence. Your answer will be of the form an + b.

14, 18, 22, 26, 30, ...

Answer 1

14, 18, 22, 26, 30, . . . = 14, 14 + 4, 14 + 8, 14 + 12, 14 + 16, . . . = 14, 14 + 1(4), 14 + 2(4), 14 + 3(4), 14 + 4(4), . . . = 14 + 4(n - 1) = 14 + 4n - 4 = 4n + 10