Question

Complete the recursive formula of the arithmetic sequence 13,17,21,25

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

Answer 1

`a_(n) = 4n+9`

Explanation:

`a_(n) = a_(1) +(n - 1)d`

`a_(n) = 13 +(n - 1)4`

`a_(n) = 13 +4n-4`

`a_(n) = 4n+13-4`

`a_(n) = 4n+9`