Question

Help asap please!!

What is the recursive rule for this geometric sequence? 500, 100, 20, 4, ...
What is the recursive rule for this geometric sequence?

500, 100, 20, 4, ...


a1=500; an=−5an−1

a1=2500; an=15an−1

a1=500; an=15an−1

a1=2500; an=−5an−1

Answer 1

Explanation:

The common ratio = 100/500 = 1/5 and the first term a1 = 500.

The rule is a1=500; an = 1/5a(n-1)