Vertical and Horizontal Asymptotes of Rational Functions

Identifying Vertical Asymptotes of Rational Functions

By looking at the graph of a rational function, we can investigate its local behavior and easily see whether there are asymptotes. We may even be able to approximate their location. Even without the graph, however, we can still determine whether a given rational function has any asymptotes, and calculate their location.

Source: Rice University, https://openstax.org/books/college-algebra/pages/5-6-rational-functions
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