# How do you find the domain for g(a)=-10/a?

Jun 4, 2017

$x \in \mathbb{R} , a \ne 0$
$\text{the function is defined for all real values of a except}$
$\text{for the value that makes the denominator equal zero}$
$\Rightarrow a = 0 \leftarrow \textcolor{red}{\text{ is the excluded value}}$
$\text{domain is } a \in \mathbb{R} , a \ne 0$