Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.1 - Real Numbers - 1.1 Exercises: 80



Work Step by Step

$|1-\sqrt{2}|$ Here, $\sqrt{2}\gt1$. This means that the substraction inside absolute value bars will result in a negative number. To express this quantity without the absolute value bars, we must change its sign. $|1-\sqrt{2}|=-(1-\sqrt{2})=\sqrt{2}-1$
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