1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    You might consider rationalizing numerator. Then there's no need to use L'Hôpital's rule.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Calculation Limit Date
Calculation of limit. L'Hopital's rule Jun 3, 2017
Calculate limit of piecewise function Apr 24, 2016
Calculation of limit Apr 23, 2016
Calculating Limit Sep 24, 2015
Limit calculation Sep 20, 2015