College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 3 - Section 3.1 - Functions - 3.1 Assess Your Understanding - Page 212: 75

Answer

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Work Step by Step

$f(x)=\frac{2x+3}{3x-2},$ $g(x)=\frac{4x}{3x-2}$ a.$(f+g)(x)=\frac{2x+3}{3x-2}+\frac{4x}{3x-2}=\frac{6x+3}{3x-2}$ for all ${ x|x \in \mathbb{R} \ne 2/3}$ b.$(f-g)(x)=\frac{2x+3}{3x-2}-\frac{4x}{3x-2}=\frac{-2x+3}{3x-2}$ for all ${ x|x \in \mathbb{R} \ne 2/3}$ c. $(f \times g)(x)=\frac{(2x+3)(4x)}{(3x-2)(3x-2)}=\frac{8x^2+12x}{9x^2-12x+4}$ for all ${ x|x \in \mathbb{R} \ne 2/3}$ d. $(f/g)(x)=\frac{2x+3}{4x}$ for all ${ x|x \in \mathbb{R} \ne \{2/3, 0 \}}$ e. $(f+g)(3)=3$ f. $(f-g)(4)=-\frac{1}{2}$ g. $(f\times g)(2)=14$ h. $(f/g)(1)=\frac{5}{4}$
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