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Homework Help: Test tomorrow, don't know how to do this simple question

  1. Feb 23, 2009 #1
    show that f(x,y) = e^(-x-y) is uniformly continuous if x>0 and y>0.

    I duno how to start, I know the definition, but if I'm trying to do it the epsilon delta way i don't know how to pick delta and epsilon.
  2. jcsd
  3. Feb 23, 2009 #2


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    Homework Helper

    Re: Test tmr, duno how to do this simple question

    how about noticing that f only varies between zero and 1...

    also consider the variable r = x+y, with r>0
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