5. Rational Expressions:
(1).Def:A rational expression is the quotient of two polynomials.
(2)Domain: the set of all real numbers for which the expression is defined.
For a rational expression, the domain is the set of the numbers that make the
so the domain of this expression is
(3)Simplifying, Multiplying, and Dividing rational expressions
(3)Adding and Subtracting Rational Expressions
* Strategy:(1)simplify. (2) find the least common
6 : Radical Notation and Rational Exponents:
(2)(i)if n is even:
(ii) if n is odd:
(i) Def: , where m and n are integers