Precalculus Examples

$\log (x) - \log (4) = \log (4) - \log (x + 4)$

Step 1

Set the argument in $\log (x)$ greater than $0$ to find where the expression is defined.

$x > 0$

Step 2

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

Interval Notation:

$(0, \infty)$

Set-Builder Notation:

${x | x > 0}$

Step 3