1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook