Question

Find f(5) for this sequence:

f(1) = 2 and f(2) = 4, f(n) = f(1) + f(2) + f(n - 1), for n > 2.

f(5) = ______

Answer 1

f(3)=f(1)+f(2)+f(2)=2+4+4=10
f(4)=f(1)+f(2)+f(3)=2+4+10=16
f(5)=f(1)+f(2)+f(4)=2+4+16=22