Question

The Fibonacci sequence is F(n) = F(n-1) + F(n - 2).
If F(7) = 13 and F(8) = 21, which of the following is true?

Answer 1

Answer:

D

Step-by-step explanation:

Given

F(7) = 13 and F(8) = 21, then

F(9) = F(8) + F(7) = 21 + 13 = 34

Answer 2

$f(9)=f(8)+f(7)=21+13=34\implies \text{D}$