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calculus130
Group Title
calculate, if existent, via l'Hopital rule:
lim>3 x^2+x12/x^3x^26x
 2 years ago
 2 years ago
calculus130 Group Title
calculate, if existent, via l'Hopital rule: lim>3 x^2+x12/x^3x^26x
 2 years ago
 2 years ago

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infoshark Group TitleBest ResponseYou've already chosen the best response.0
what do you get when u sub in 3 ?
 2 years ago

calculus130 Group TitleBest ResponseYou've already chosen the best response.0
i am clueless totally..
 2 years ago

infoshark Group TitleBest ResponseYou've already chosen the best response.0
if you put 3 instead of x, what do you get ?
 2 years ago

calculus130 Group TitleBest ResponseYou've already chosen the best response.0
i get 12/0
 2 years ago

infoshark Group TitleBest ResponseYou've already chosen the best response.0
try one more time.
 2 years ago

calculus130 Group TitleBest ResponseYou've already chosen the best response.0
oh yeah 0/0
 2 years ago

infoshark Group TitleBest ResponseYou've already chosen the best response.0
now u can use l'hopital's rule. do the derivative of the top over the derivative of the bottom
 2 years ago

calculus130 Group TitleBest ResponseYou've already chosen the best response.0
i have done it that way too but i need step by step to check my answer
 2 years ago

infoshark Group TitleBest ResponseYou've already chosen the best response.0
whats the derivative of the numerator over the derivative of the denom that you got ?
 2 years ago

infoshark Group TitleBest ResponseYou've already chosen the best response.0
2x+1 / 3x^22x6
 2 years ago

infoshark Group TitleBest ResponseYou've already chosen the best response.0
plug in 3 for x.
 2 years ago

calculus130 Group TitleBest ResponseYou've already chosen the best response.0
if i plug 3 for x then the final answer is 7/9 is that right?
 2 years ago

richyw Group TitleBest ResponseYou've already chosen the best response.0
\[\lim_{x\rightarrow 3} \frac{ x^2+x12}{x^3x^26x}\]Plug in and see we have an indeterminate form.\[\frac{ 3^2+312}{3^33^26(3)}=\frac{0}{0}\]Appling L'Hopitals rule\[\lim_{x\rightarrow 3} \frac{ \frac{d}{dx}(x^2+x12)}{\frac{d}{dx}(x^3x^26x)}\]\[\lim_{x\rightarrow 3} \frac{ 2x+1}{3x^22x6}\]\[\frac{2(3)+1}{3(3)^22(3)6}\]\[\frac{6+1}{2766}=\frac{7}{15}\]
 2 years ago

calculus130 Group TitleBest ResponseYou've already chosen the best response.0
thanks you so much my friend
 2 years ago

richyw Group TitleBest ResponseYou've already chosen the best response.0
for future reference, if you are just checking your answers, see if wolfram will give you the steps first... http://www.wolframalpha.com/input/?i=lim+x%3E3+%28x%5E2%2Bx12%29%2F%28x%5E3x%5E26x%29
 2 years ago

calculus130 Group TitleBest ResponseYou've already chosen the best response.0
thank you again for the link
 2 years ago
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