## Precalculus (6th Edition) Blitzer

Given functions $f$ and $g$, at points where $g(x)\ne0$, we can find the quotient as $(\frac{f}{g})(x)=\frac{f(x)}{g(x)}$, and the domain of the resulting function consists of the intersection of domains for $f$ and $g$, and excludes $x$ values where $g(x)=0$.