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Coolmath Precalculus Review Calculus Preview
Lesson 17 - Graphing - Rational Functions: Finding Vertical Asymptotes
(page 1 of 2)
---- This Precalculus review (Calculus preview) lesson explains how to find the vertical asymptotes when graphing rational functions.

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Remember asymptotes?

We've got that sentence:

Graphs hug asymptotes.

What does it mean?

Let's check out one of our old friends...

f( x ) = 1 / x

graph of y = 1 / x ... the x and the y axes are asymptotes See how the graph is getting closer and closer to the axes?...  But, it will never touch them?

The x and y axes are asymptotes!

 

Asymptotes are lines (usually invisible) in space that a graph gets closer and closer to but never touches...
 

Graphs hug asymptotes.

Continued on the next page

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