Answer
$-4$
Work Step by Step
$f(1)=-6, g(1)=-3, f(-1)=3, g(-1)=-2$
$(f+g)(1)=f(1)+g(1)=-6+(-3)=-9$
$(g-f)(-1)=g(-1)-f(-1)=-2-3=-5$
$(f+g)(1)-(g-f)(-1)=-9-(-5)=-9+5=-4$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
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 - Page 133: 59
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