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Another limit problem

  1. Feb 25, 2008 #1
    lim sqrt(x^2 + x) - x as x approaches infinity

    Not sure what I need to do. I tried to make it into a fraction so I could apply L'Hospital's rule but I didnt' get anywhere with that. Any ideas?
     
  2. jcsd
  3. Feb 25, 2008 #2

    arildno

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    [tex]1=\frac{\sqrt{x^{2}+x}+x}{\sqrt{x^{2}+x}+x}[/tex]
     
  4. Feb 25, 2008 #3
    Yeah like arildno suggested you need to rationalize the expression by multiplying with what post #2 suggests!
     
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