College Algebra (10th Edition)

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

Chapter 6 - Section 6.1 - Composite Functions - 6.1 Assess Your Understanding - Page 410: 74

Answer

$(f+g)(x)=4x+3\text{ , }\{x|\Re\}$ $(f-g)(x)=2x+13\text{ , }\{x|\Re\}$ $(f\cdot g)(x)=3x^2-7x-40 \text{ , }\{x|\Re\}$ $(\dfrac{f}{g})(x)=\dfrac{3x+8}{x-5} \text{ , }\{x|x\ne5\}$

Work Step by Step

$(f+g)(x)=3x+8+x-5=4x+3\text{ , }\{x|\Re\}$ $(f-g)(x)=3x+8-(x-5)=2x+13\text{ , }\{x|\Re\}$ $(f\cdot g)(x)=(3x+8)\cdot (x-5)=3x^2-15x+8x-40=3x^2-7x-40 \text{ , }\{x|\Re\}$ $(\dfrac{f}{g})(x)=\dfrac{3x+8}{x-5} \text{ , }\{x|x\ne5\}$
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