Question

Find the first, fourth, and eighth terms of the sequence.
a(n)=-5*3^n-1

Answer 1

I believe to solve this question for the first term plug in n=1. For the fourth, n=4 and the 8th term, n=8 and solve these separate equations to obtain the value for each term.

Answer 2

a(1) = 5*3^0 = 5*1 = 5

a(4) = 5*3^4 = 5*81 = 405

a(8) = 5*3^8 = 5*81*81 = 32805

hope this will help you