Question

What is the 12th term of the arithmetic sequence given by the explicit rule a(n)= -39 + (n - 1)(7)?

Answer 1

38

Explanation:

Substitute n = 12 into the explicit rule

a(12) = - 39 + (12 - 1)7 = - 39 + (11 × 7) = - 39 + 77 = 38