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Infinite limit problem

  1. Sep 23, 2010 #1
    Determine the infinite limit:

    lim ln (x^2 - 9)
    x -> 3^+

    Don't understand how the answer is negative infinity.

    Thanks for the help
     
  2. jcsd
  3. Sep 23, 2010 #2
  4. Sep 23, 2010 #3
    ln(ab) = ln(a) + ln(b).

    That is what you need to understand your limit.

    Note that x^2 -9 can be factored.
     
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