Question

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

Answer 1

Answer: a1=5 an=an-1. ( -1/8)

Step-by-step explanation: I took the test

Answer 2

an=a1(r)^(n-1)
an=5(-3)^(n-1)
so then each term is multiplied by -3

so
f(n)=-3(f(n-1))
and
f(n)=5