Here are the rules:

- If the degree of is less than the degree of , then the limit is 0.
- If the degree of and are the same, then divide the coefficients of the terms with the largest exponent to get the limit.
- If the degree of is greater than the degree of , then the limit is either or depending on the signs of polynomials. If both the coefficients of the largest exponent are either negative or both positive, then the limit is . Otherwise, the limit is .

Here is an example of Rule 1 (click here):

Here is an example of Rule 2 (click here):

Here is an example of Rule 3 (click here):

Rational functions are easy to solve as long as you remember those three rules. Next post, we will talk about L’Hopital’s rule.

Until next time,

Leah

Thank you for another essential article. I have learned a lot from your article.I like mathematic. Thank so much, again.

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