Question

If f(1) = 3 and f(n) = f(n-1) + 3 then find the value of f(5).

Answer 1

f(5) = 15

Explanation:

f(2) = f(2-1) + 3

= f(1) + 3

= 3 + 3

= 6

f(3) = f(3-1) +3

= 6 + 3

= 9

f(4) = f (4-1) + 3

= 9 + 3

= 12

f(5) = f(5-1) + 3

= 12 + 3

= 15