Question

Find the first, fourth, and eighth terms of the sequence. A(n) = –5 • 3n–1 please help me

Answer 1

First term: -10

Fourth term: -55

Eighth term: -115

Explanation:

I am assuming the means -5(3n-1). To find the first term, plug in 1. You will get -5(3*1-1) or -5*2 or -10.

To find the fourth term, plug in 4. You will get -5(3*4-1) or -5*11 or -55.

To find the eighth term, plug in 8. You will get -5(3*8-1) or -5*23 or -115.

So the answers are -10, -55, and -115.