Question

What is the fifth term of the sequence described by the following explicit formula? an = 4 + (n + 1)(-5)

a. -26
b. -30
c. -34
d. -20

Answer 1

a

Explanation:

substitute n = 5 into the explicit formula , then

a₅ = 4 + (5 + 1)(- 5) = 4 + 6(- 5) = 4 - 30 = - 26