Answer
Division by zero is not defined.
Work Step by Step
$f(3)$ is not defined because calculating $f(3)$ leads to a 0 in the denominator,
and division by zero is not defined.
Thus, x=3 is not in the domain of f.
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 2.2 - Graphs of Functions - Exercise Set - Page 125: 73
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