Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter P - Section P.9 - Linear Inequalities and Absolute Value Inequalities - Exercise Set - Page 140: 129

Answer

See explanations.

Work Step by Step

Use the property: if $|u|\gt c$, then $u\gt c$ or $u\lt -c$; solve individual inequalities and then combine the results (union). For example, if $|2x|\gt 4$, we have $2x\gt 4$, which gives $x\gt2$; or we could have $2x\lt -4$, which gives $x\lt -2$, and the combined solutions are $(-\infty, -2)\cup(2,\infty)$
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