# Precalculus Examples

Find the domain for .
Set the radicand in greater than or equal to to find where the expression is defined.
The domain is all values of that make the expression defined.
Interval Notation:
Set-Builder Notation:
Interval Notation:
Set-Builder Notation:
To find the square root end point, substitute the value , which is the terminal value in the domain, into .
Replace the variable with in the expression.
Simplify the result.
Remove parentheses.
Rewrite as .
Pull terms out from under the radical, assuming positive real numbers.
The final answer is .
The square root end point is .