Calculus 8th Edition

Published by Cengage
ISBN 10: 1285740629
ISBN 13: 978-1-28574-062-1

Appendix A - Numbers, Inequalities, and Absolute Values - A Exercises: 32

Answer

$(-\infty,-\sqrt 5]$ U $[\sqrt 5, \infty)$

Work Step by Step

Simplify the expression on one side $x^2-5\geq0$ Identify the key numbers by equating to zero $(-\infty,-\sqrt 5]$ $(\infty,\sqrt 5]$ $[\sqrt 5,\sqrt 5]$ Assign a test value for each interval to determine the sign $(-\infty,-\sqrt 5]$ U $[\sqrt 5, \infty)$
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