Question

The recursive formula for a geometric sequence is given below.

f(1) = 5
(n) = 3 . f(n − 1), for n > 2
What is the 7th term in the sequence?

Answer 1

3645

Explanation:

f(1)=5

f(2)=3*5=15.

f(3)=45, basically it's a geometric sequence with formula an=5*(3)^(n-1). The 7th term is 5*(3)^6=3645