Chapter 3 - Section 3.1 - Functions - 3.1 Assess Your Understanding - Page 212: 72

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$f(x)=|x|,$ $g(x)=x$ a.$(f+g)(x)=|x|+x$ for all ${x|x \in \mathbb{R}}$ b.$(f-g)(x)=|x|-x$ for all ${x|x \in \mathbb{R}}$ c. $(f \times g)(x)=|x|\times x=x|x|$ for all ${x|x \in \mathbb{R}}$ d. $(f/g)(x)=\frac{|x|}{x}$ for all ${x|x \in \mathbb{R}} \ne 0$ e. $(f+g)(3)=3+3=6$ f. $(f-g)(4)=0$ g. $(f\times g)(2)=4$ h. $(f/g)(1)=1$