Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Evaluate this limit

  1. Apr 21, 2009 #1

    How would someone evaluate this limit?? :confused:
    http://img407.imageshack.us/img407/9899/14403274.gif [Broken]

    I can't get rid of the infinite/infinite problem using l'hospital rule :confused:

    thank you
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Apr 21, 2009 #2
    Rewrite the fraction using the same base for each power so that you can express it as Af(x). Ie., Euler's number e makes a useful base.
  4. Apr 21, 2009 #3
    you mean like that? http://img242.imageshack.us/img242/8780/58121121.gif [Broken]
    or like that ? http://img172.imageshack.us/img172/9394/47770366.gif [Broken]
    sorry I don't really know how :confused:
    Last edited by a moderator: May 4, 2017
  5. Apr 21, 2009 #4
    Pi is ea for some number a while 4 is eb for some number b. In particular, those numbers are ln(pi) and ln(4). We then have eax - bx = e(a-b)x.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook