Precalculus Examples

$- \frac{c}{a}$

Step 1

Set the denominator in $\frac{c}{a}$ equal to $0$ to find where the expression is undefined.

$a = 0$

Step 2

The domain is all values of $c$ that make the expression defined.

Interval Notation:

$(- \infty, 0) \cup (0, \infty)$

Set-Builder Notation:

${c | c \neq 0}$