Question 370596: Explain how to determine which numbers must be excluded from the domain of a rational expression.
Answer by robertb(5830)   (Show Source):
You can put this solution on YOUR website! Make sure that the denominators are not equal to 0. This said, just solve for the roots of the denominators, and exclude these from the domain. For example,
 is a rational expression whose denominators are zero at 0,1, -1,2, and 3. Thus the domain of this expression is the set of all real numbers except 0,1, -1,2, and 3.
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