Question

Write an explicit formula for the nth term of the sequence 16, 7, -2

Answer 1

Formula for nth term is 25 - 9n.

Explanation:

common difference (d)= -9

a = 16

Now,

an = a + d(n - 1)

an = 16 + -9(n - 1)

or, an = 16 - 9n + 9

Hence an = 25 - 9n.