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Math 211 Business Calculus Applications of Derivatives

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– p. 6/34<br />

Horizontal Asymptotes<br />

To find horizontal asymptotes<br />

compute the limit asx → ∞ (or−∞)<br />

Example: Consider the function<br />

f(x) = 5x3 +4x−8<br />

x 3 −2x 2 −3x<br />

Find the horizontal asymptotes <strong>of</strong> f(x)<br />

Solution: Compute the limit<br />

5x 3 +4x−8<br />

lim f(x) = lim<br />

x→∞ x→∞x 3 −2x 2 −3x

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