Examples
log(x)log(x)
Step 1
Set the argument in log(x)log(x) greater than 00 to find where the expression is defined.
x>0x>0
Step 2
The domain is all values of xx that make the expression defined.
Interval Notation:
(0,∞)(0,∞)
Set-Builder Notation:
{x|x>0}{x|x>0}
Step 3