# Chapter 5 - Sequences, Mathematical Induction, and Recursion - Exercise Set 5.1: 10

$a_n = (-1)^{n+1}$

#### Work Step by Step

$a_0 = (-1)^{1} = -1$ $a_1 = (-1)^{2} = 1$ $a_2= (-1)^{3} = -1$ Seeing the pattern, $a_n$ should alternate between 1, -1

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.