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Another multi-v limit

  1. Oct 1, 2009 #1
    1. The problem statement, all variables and given/known data
    [tex]\frac{lim}{(x,y)->(1,-1)}[/tex] [tex]\frac{1-xy}{1+xy}[/tex]


    2. Relevant equations
    none


    3. The attempt at a solution
    I know from the graph this limit doesn't exist, but I tried subbing y=-x, xy=u, y=-1, x=1, and I always come up with the limit going to infinity. Not sure what I'm doing wrong, but I feel like I'm close.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 1, 2009 #2

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    I'm not sure what your question is. Isn't 'going to infinity' one way that a 'limit doesn't exist'?
     
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