Question

Which recursive formula describes the sequence 3,15, -75, -375 1875, ... where n represents the number of terms in the pattern and f(1) = 3?

a. f(n) = 5f(n-1)
b. f(n) = -5f(n-1)
c. f(n) = (-1)^n *5f(n-1)
d. f(n) - (-1)^n-1 *5f(n-1)

Answer 1

I think B is the answer of this question