Question

Im not entirely sure what to do here can anyone explain it and tell me the answer

Answer 1

14

Explanation:

Plug in 3 in f(n).

f(3) = f(3−1) + 5.5

f(3) = f(2) + 5.5

We need to find f(2). So plug in 2 in f(n).

f(2) = f(2−1) + 5.5

f(2) = f(1) + 5.5

f(2) = 3 + 5.5

f(2) = 8.5

Therefore:

f(3) = 8.5 + 5.5

f(3) = 14

Answer 2

We have
`f(n)=f(n-1)+5.5`. By entering 3 we get
`f(3)=f(3-1)+5.5=f(2)+5.5` because we enter again the function will apply further (will be recursive).
`f(2)=f(2-1)+5.5+5.5=f(1)+5.5+5.5=3+5.5+5.5=\boxed{14}`.

Hope this helps.