# Precalculus Examples

, ,
Set up the composite result function.
Evaluate by substituting in the value of into .
Remove parentheses.
Solve to find the values of that make the expression defined.
Set up the equation to solve for .
Since does not contain the variable to solve for, move it to the right side of the inequality by subtracting from both sides.
Find the set of inequalities that expresses where is defined.
The domain is all values of that make the expression defined.

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