Question

Find f(5) for this sequence:
f(1)=2 and f(2)=3, f(n)= f(n-1)+f(n-2), for n>2

Answer 1

start with n=3

Answer 2

I don't know how to do it because I am checking my sons homework

Answer 3

equation is given put n=3 u will get f(3)...continue..same...u will get f(4) ..then f(5)

Answer 4

by the logic: f(n) = f(n -1) + f(n- 2) for n > 2

f(3) = f(3-1) + f(3 - 2)
which is:
f(3) = f(2) + f(1)
f(3) = 3 + 2 (given in problem)
f(3) = 5


using the sequence again:

f(4) = f(4 - 1) + f(4 - 2)
f(4) = f(3) + f(2)
f(4) = 5 + 3
f(4) = 8


do you want to try and find f(5)?

Answer 5

yes u r going right ...now calculate f(5)

Answer 6

f(5) = f(4) + f(3)