Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 9 - Section 9.1 - The Algebra of Functions; Composite Functions - Exercise Set - Page 540: 8

Answer

$(f+g)(x)=f(x)+g(x)=4x^3-6x$ $(f−g)(x)=f(x)−g(x)=4x^3+6x$ $(f×g)(x)=f(x)×g(x)=-24x^4$ $(\frac{f}{g})(x)=\frac{-2x^2}{3}$

Work Step by Step

If $f(x)=4x^3$ and $g(x)=-6x$, then $(f+g)(x)=f(x)+g(x)=4x^3-6x$ $(f−g)(x)=f(x)−g(x)=4x^3-(-6x)=4x^3+6x$ $(f×g)(x)=f(x)×g(x)=(4x^3)\times(-6x)=-24x^4$ $(\frac{f}{g})(x)=\frac{f(x)}{g(x)}=\frac{4x^3}{-6x}=\frac{-2x^2}{3}$
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