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Homework Help: Limit question

  1. Aug 27, 2011 #1
    I'm on mobile so I wont use latex.

    Lim x -> 3 ln(x^2-9)

    My question is why limit approaches - infinite? When I plug in the numbers I get positive infinite.
  2. jcsd
  3. Aug 27, 2011 #2
    How did you get positive infinite?? Can you show me what you did?
  4. Aug 27, 2011 #3
    Since I have to figure out x>3, I plugged in the values such as x=4 y=1.945, x=3.5 y=1.178, x=3.9 y=1.826. Whoops I found my mistake haha. I kept plugging in 3.9 and 3.9999 thinking it was closer to 3, when I should had plugged in 3.01 and 3.001. Thank you.
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