Answer
$3$
Work Step by Step
$\mathrm{x}=3$ belongs to the third interval, so we use $\mathrm{f}(\mathrm{x})=\mathrm{x}$
$\mathrm{f}(3)=3$
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 53: 35d
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