Question

An arithmetic sequence is represented by the explicit formula A(n) = 2 + 9(n - 1). What is the recursive formula?

Answer 1

A recursive formula always has two parts:
1. The starting value for a1.
2. The recursion equation for an as a function of an-1 (The term before it.)

A recursive formula may list the first two (or more) terms as starting values, depending upon the natrue of the sequence. In such caes, the an portion of the formula is dependent upon the previous two (or more) terms..

Answer 2

I believe this is correct. @Rachella

Answer 3

pictures don't work :(