Question

Given the recursive formula shown, what are the first 4 terms of the sequence?

f(n)=
f(1) = 3
(f(n)=f(n-1)+4 if n>1
OA) 3, 7, 11, 15
B) 4, 7, 10, 13
C) 3, 9, 11, 13
D) 3, 8, 10, 12

Answer 1

Option A: 3, 7, 11, 15

Explanation:

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

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

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

f(5) = f(4) + 4 = 15 + 4 = 19