precalc

jkjkjk:

3a(n-1)+8, a(1)=-10

If this is meant to be a(n) = 3a(n-1) + 8 with a(1) = -10, and you are looking for an explicit expression for a(n) then you can do it by writing down the first few terms and looking for the pattern, as below:

a(n).PNG