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Math Help - continuous function

  1. #1
    Junior Member
    Joined
    Aug 2009
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    continuous function

    Hi, how can I show this function is continuous?

    f(x,y)=x/y+y/x-1

    I could go with an e-d definition, but there seems to be an easier way. Can I argue continuity of rational functions for two variables?
    Last edited by altave86; February 11th 2010 at 02:55 PM.
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