Question

An arithmetic sequence is represented by the explicit formula A(n) = 2 − 5(n − 1). What is the recursive formula?

A. A(n) = A(n − 1) + 5
B. A(n) = A(n − 1) + 2
C. A(n) = A(n − 1) − 5
D. A(n) = A(n − 1) − 2

Answer 1

since you just keep subtracting 5,
A(1) = 2
A(n) = A(n-1) - 5