Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 2 - Section 2.3 - The Algebra of Functions - Exercise Set: 13

Answer

$(f+g)(x)=3x^{2}+x-5$ $(f+g)(5)=75$

Work Step by Step

$(f+g)(x)=f(x)+g(x)$ $=x-5+3x^{2}$ $=3x^{2}+x-5$ Plugin $x=5$ into $3x^{2}+x-5$. $(f+g)(5)=3\times5^{2}+5-5=3\times25=75$
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