The function is not
defined when the denominator is zero, that is x
= 4.

Also it is not
defined when the radicand is negative, that is

x + 5

0. So, x

–5.

.

Pasted
from <http://hotmath.com/help/bookindexes/larcal06/index.html>

Sent from Microsoft Office OneNote 2007 by Michael
Plasmeier