Question

A geometric sequence is defined by the explicit formula an = 3(-5)n-1. What is the recursive formula for the nth term of this sequence?

Answer 1

The first term(a1) is 3
The second term (a2) is obtained by multiplying 3*(-5)
The third term A3 by multiplying 3 * -5 -5 = a2 times -5
Than you go on and one with that
But your answer is
A1=3;an+1=an(-5)