Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Appendix A - Review - A.10 Internal Notation; Solving Inequalities - A.10 Assess Your Understanding - Page A87: 12


Interval Notation: $(-1,2)$ Inequality Form: $-1\lt x\lt 2$

Work Step by Step

Since the bracket notations are open (because of the use of parentheses) at $-1$ and $2$, then the interval is $(-1,2)$. In terms of inequality, we have $-1\lt x\lt 2$.
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