College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 1 - Equations and Inequalities - Exercise Set 1.7 - Page 198: 134


When graphing the solutions of an inequality, a parenthesis indicates an endpoint that is not included in an interval, while a square bracket indicates an endpoint that is included in an interval.

Work Step by Step

As an example, $(3,7]$ indicates that $3$ is not included in the interval, while $7$ is included.
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