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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

Respuesta :

Answer:

Step-by-step explanation:

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

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