Answer: f(n) = {f(1)=-4
{f(n) = f(n-1) / 20 if n > 1
Or Answer B.
Step-by-step explanation:
Answer: 4(5+2) or 4(2+5)
8 = 2*2*2
20 = 2*2*5
4(5+2) = 20+8