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limx→2 (x^3−8)/(12x−24)

 Jan 27, 2016

Best Answer 

 #1
avatar+26387 
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\(\lim \limits_{x\to 2} { \frac{x^3-8}{12x-24} }\)

 

l'Hospital's rule


 

\(\begin{array}{rcll} \lim \limits_{x\to 2} { \frac{x^3-8}{12x-24} } &=& \lim \limits_{x\to 2} { \frac{3x^2}{12} }\\ &=& { \frac{3\cdot 2^2}{12} }\\ &=& { \frac{12}{12} }\\ \mathbf{\lim \limits_{x\to 2} { \frac{x^3-8}{12x-24} } }&\mathbf{=}& \mathbf{1}\\ \end{array}\)

 

laugh

 Jan 27, 2016
 #1
avatar+26387 
+5
Best Answer

\(\lim \limits_{x\to 2} { \frac{x^3-8}{12x-24} }\)

 

l'Hospital's rule


 

\(\begin{array}{rcll} \lim \limits_{x\to 2} { \frac{x^3-8}{12x-24} } &=& \lim \limits_{x\to 2} { \frac{3x^2}{12} }\\ &=& { \frac{3\cdot 2^2}{12} }\\ &=& { \frac{12}{12} }\\ \mathbf{\lim \limits_{x\to 2} { \frac{x^3-8}{12x-24} } }&\mathbf{=}& \mathbf{1}\\ \end{array}\)

 

laugh

heureka Jan 27, 2016

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