Answer
$\:f(x)\:$ is called the integer part of $\:x\:$ because the domain is $\:R\:$ (real numbers) and range is $\:Z\:$ (integers).
Work Step by Step
$\mathrm{See\:the\:graph\:above.}$
University Calculus: Early Transcendentals (3rd Edition)
by Hass, Joel R.; Weir, Maurice D.; Thomas Jr., George B.
Published by
Pearson
ISBN 10:
0321999584
ISBN 13:
978-0-32199-958-0
Chapter 1 - Section 1.1 - Functions and Their Graphs - Exercises - Page 12: 36
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