Operations with Functions

Concept

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Operations on Functions
You can add, subtract, multiply, and divide numbers. You can add, subtract, multiply, and divide polynomials. You can also add, subtract, multiply, and divide functions. And performing these operations on functions is no more complicated than the notation itself. For instance, when they give you the formulas for two functions and tell you to find the sum, all they're telling you to do is add the two formulas. There's nothing more to this topic than that, other than perhaps some simplification of the expressions involved.
purplemath.com

Tutorial covering addition, subtraction, multiplication, division and composition of functions.  A discussion of domain and range is included.  Practice problems are provided.

wtamu.edu

Tutorial covering addition, subtraction, multiplication and division of functions.

purplemath

Tutorial covering addition, subtraction, multiplication and division of functions.
 

alltel.net

Tutorial covering the domain of the function resulting from addition, subtraction, multiplication and division of functions.

 

cnx.org

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