Question

Find the first six terms of the sequence.

a1 = 7, an = an-1 + 6

13, 19, 25, 31, 37, 43

0, 6, 12, 18, 24, 30

7, 6, 12, 18, 24, 30

7, 13, 19, 25, 31, 37

Answer 1

Well we know that a1 = 7

so

\[\large a2 = a_{2 - 1} + 6\]
meaning
\[\large a2 = a_{1} + 6\]

We are given that a1 = 7 so

\[\large a2 = 7 + 6 = 13\]