Find the first six terms of the sequence.

a1 = 7, an = an-1 + 6

Choices:

A. 13, 19, 25, 31, 37, 43

B. 0, 6, 12, 18, 24, 30

C. 7, 6, 12, 18, 24, 30

D. 7, 13, 19, 25, 31, 37

The correct answer to this question is this one: "D. 7, 13, 19, 25, 31, 37."

You can find a1+1 because you know the value of a1.

Now when you get to know the value of a1+1, you can get the value of a1+1+1. Repeat the cycle.

Because a2=a1+6, a2=7+6.

From that sequence, we can say that

a1 = 7

a2 = 13

a3 = 19

a4 = 25

a5 = 31

a6 = 37