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L'hopital's rule confusion

  1. Oct 28, 2011 #1
    I understand the use of this rule for the limit as x goes to 0, but not for the limit as x goes to infinity. Can this rule be used to find limits to infinity? How?

    I have googled this but couldn't find a good explanation.
     
  2. jcsd
  3. Oct 28, 2011 #2

    AlephZero

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    You can substitute u =1/x, and find the limit as u goes to 0.
     
  4. Oct 28, 2011 #3
    Thanks!
     
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