Question

Consider the sequence following a minus 8 pattern: 9, 1, −7, −15, ….

a. Write an explicit formula for the sequence.

Answer 1

a(n) = a+(n-1)d

a(n) = nth term of sequence

a = first term of sequence

d = difference between number

Explanation:

a(5) = 9+(5-1)(-8)

a(5)= -23