#### Answer

The expression is undefined if $x=-\frac{1}{3}$

#### Work Step by Step

A fraction is undefined, if the denominator equals to zero.
Here:
$3x+1=0$
$3x=-1$
$x=-\frac{1}{3}$
The expression is undefined if $x=-\frac{1}{3}$

Published by
Pearson

ISBN 10:
0-32184-874-8

ISBN 13:
978-0-32184-874-1

The expression is undefined if $x=-\frac{1}{3}$

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