Question

Find the 4th term of the recursive rule where f(1) = 3, and f(n) = f(n - 1) + 4.

Answer 1

15

Explanation:

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

f(4)=f(3) +4

f(3)=f(2) +4

f(2)=f(1) +4

f(2)=3+4

f(2)=7

f(3) =7+4

=11

f(4)=11+4

=15

Answer 2

f(1) = 3

f(2) = f(1) + 4 = 3 + 4 = 7

f(3) = f(2) + 4 = 7 + 4 = 11

f(4) = f(3) + 4 = 11 + 4 = 15