Polynomial functions and rational functions

Rational functions:

The purpose of this discussion is to find out why some rational functions are not defined for a certain real numbers . Consider the rational function 



1. Find the domain of f(x) in set builder notation

2. Find the domain of f(x) in interval notation.

3. Evaluate the function at x=1, and x=3 and discuss your findings 

4. Comment to at least 2 students post.

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