Question

A geometric sequence begins with 72, 36, 18, 9,

Which option below represents the formula for the sequence?
Of(n) = 72(2)-1
Of(n) = 72(2)+1
Of(n) = 72(0.5)-1
Of(n) = 72(0.5)+1

Answer 1

f(n) = 72(0.5)n−1

Explanation:

Got right.