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?

Question

A. F(15)=34

B. F(9)=34

C. F(9)=32

D. F(6)=13

Answer 1

F(9) = F(8) + F(7)

 

       = 21 + 13 = 34

 

Answer:  B

Answer 2

Only C is correct....F(6) = 8 and the other 2 answers make no sense.