



 
David, I think the best action at this point is to make a change of variables z = x then the expression becomes
and the limit changes to z > ∞. Now since z is approaching plus infinity I can assume z is positive so z = √(z^{2}). Divide the numerator and denominator by z
Now as z > ∞ the numerator approaches 0 and the denominator approaches 2. Thus the limit is 0. Harley  


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