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: 4

Answer

(a) absolute value (b) positive

Work Step by Step

(a) This symbol stands for the absolute value of $x$, that is, the distance between $x$ and $0$ at the number line. (b) Since the absolute value of $x$ stands for the distance between $x$ and 0 at the number line, it will always have a positive value, except when $x=0$.
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