Answer
$a^{2}+2a+3$
Work Step by Step
Replace $x$ with $a$ in the relation defining f,
$f(a)=a^{2}+2a+3$
Finite Math and Applied Calculus (6th Edition)
by Waner, Stefan; Costenoble, Steven
Published by
Brooks Cole
ISBN 10:
1133607705
ISBN 13:
978-1-13360-770-0
Chapter 1 - Section 1.1 - Functions from the Numerical, Algebraic, and Graphical Viewpoints - Exercises - Page 52: 15e
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