Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 1 - Graphs - 2.1 Functions - 2.1 Assess Your Understanding - Page 58: 72

Answer

a. $|x| +x$ b. $|x| - x$ c. $|x|$ d. $\frac{|x|}{x}$ e. $6$ f.$0$ g. $2$ h. $1$

Work Step by Step

$f(x) = |x|$ $g(x)=x$ a. $(f+g)(x)$ $=|x| +x$ b. $(f-g)(x)$ $=|x| - x$ c. $(f \cdot g)(x)$ $=|x|$ d. $(\frac{f}{g})(x)$ $=\frac{|x|}{x}$ e. $(f+g)(3)$ $=|x| +x$ $=|3| + 3$ $=6$ f. $(f-g)(4)$ $=|x| - x$ $=|4| -4$ $=0$ g. $(f \cdot g)(2)$ $=|x|$ $=|2|$ $=2$ h. $(\frac{f}{g})(1)$ $=\frac{|x|}{x}$ $=\frac{|1|}{1}$ $=1$
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