Limit laws

1. Sep 24, 2008

eplymale3043

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Sep 24, 2008

gabbagabbahey

If you know how to do a taylor series expansion, try expanding $$x \sqrt{1+a/x}$$ and $$x \sqrt{1+b/x}$$ 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.

3. Sep 24, 2008

eplymale3043

thank you :O it was right.