Precalculus (6th Edition) Blitzer

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

Chapter 9 - Cumulative Review Exercises - Page 1038: 5



Work Step by Step

Step 1. Remove the absolute sign to get $2x-1\geq7$ and $2x-1\leq -7$ Step 2. For $2x-1\geq7$, we have $2x\geq 8$ or $x\geq4$ Step 3. For $2x-1\leq -7$, we have $2x \leq -6$ or $x\leq -3$ Step 4. The solutions are $(-\infty,-3]\cup[4,\infty)$
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