Answer
$
f(a)=\frac{a}{2}
$
Work Step by Step
Evaluate the function at $x= a$.
$$
f(a)=\frac{a \cdot a}{a+a}=\frac{a^2}{2 a}=\frac{a}{2} .
$$
Functions Modeling Change: A Preparation for Calculus, 5th Edition
by Connally, Eric; Hughes-Hallett, Deborah; Gleason, Andrew M.; Cheifetz, Phil C.
Published by
Wiley
ISBN 10:
1118583191
ISBN 13:
978-1-11858-319-7
Chapter 2 - Functions - 2.1 Input and Output - Exercises and Problems for Section 2.1 - Exercises and Problems - Page 77: 40
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