Question

How do you write the first five terms of the sequence defined recursively `a_1=15, a_(k+1)=a_k+3`?

Answer 1

`15,18,21,24,27`

Explanation:

`a_1=15`
`a_(k+1)=a_k+3`

`a_1=15`
`a_2=a_1+3=15+3=18`
`a_3=a_2+3=18+3=21`
`a_4=a_3+3=21+3=24`
`a_5=a_4+3=24+3=27`