Question

What is the 18th term of the arithmetic

sequence 2,-2.-6.-10....?
F-72
H -68
WG -70
J -66

Answer 1

J

-66

Explanation:

a1 = 2

n = 18

d = - 4

a18 = a1 + (n - 1) * d

a18 = 2 + (18 - 1)*(-4)

a18 = 2 + 17*-4

a18 = 2 - 68

a18 = -66