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Homework Help: Calculation of Limit

  1. Dec 11, 2011 #1
    1. The problem statement, all variables and given/known data

    Evaluate the limit

    Lim (√x-√a)/(x-a)

    I am not sure how to solve this. I asked my classmates and they do not know either. Help would be much appreciated!
  2. jcsd
  3. Dec 11, 2011 #2
    Looks like you have type zero-over-zero, thus permitting use of L'Hospital's rule, which says you can take the derivative of the top and the derivative of the bottom and then evaluate the limit.
  4. Dec 11, 2011 #3


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    You might consider rationalizing numerator. Then there's no need to use L'Hôpital's rule.
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