Question

How do I find the first five terms of each sequence?

a(1)=3, a(n+1)=a(n)+5

The things in the parentheses are subscripts.

Answer 1

You have a recursive formula
a(1) = 3
a(2) = a(1) + 5 = 8
a(3) = a(2) + 5 = 13

I am sure you can finish it now

Answer 2

Okay. Thank you. I tried it by myself while I was waiting for a response and wasn't sure if I did it right. But I did so, thanks again.