Which function gives the correct recursive formula for the sequence?

Question

9, 13, 17, 21, 25, 29
Responses

a1 = 4; an = an −1 +9
a1 = 4; an = an −1 +9

a1 = 13; an = a9 + 9
a1 = 13; an = a9 + 9

a1 = 9; an = an −1 +4
a1 = 9; an = an −1 +4

a1 = 9; an = an −1 + 13
a1 = 9; an = an −1 + 13

Answer 1

The correct recursive formula for the sequence 9, 13, 17, 21, 25, 29 is:

a1 = 9; an = an-1 + 4