Question

PLEASE HELP!!!

7 , 2 , -3 , -8 -13, . . .

A. an = 5n - 12

B. an = -5n + 7

C. an = 2n - 7

D. an -5n + 12

Answer 1

The answer is D an = -5n + 12

Use the formula an = a1 + d(n - 1) to solve

an = 7 + (-5)(n - 1)

an = 7 + (-5n +5)

an = -5n + 12