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Homework Help: Limit laws

  1. Sep 24, 2008 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations

    3. The attempt at a solution

  2. jcsd
  3. Sep 24, 2008 #2


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    Homework Helper
    Gold Member

    If you know how to do a taylor series expansion, try expanding [tex]x \sqrt{1+a/x}[/tex] and [tex]x \sqrt{1+b/x}[/tex] about (1/x) =0 . You'll find that the zero order terms will cancel each other, terms higher than first order will be zero i the limit x->infty and you will be left with (a-b)/2.
  4. Sep 24, 2008 #3
    thank you :O it was right.
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