Results 1 to 2 of 2

Thread: proving

  1. November 27th 2009, 03:07 PM #1
    alexandrabel90
    alexandrabel90 is offline
    Super Member
    Joined
    Aug 2009
    Posts
    639

    proving

    how do you prove that the lim xe^(-x) tends to 0 as x tends to infinity?
    Follow Math Help Forum on Facebook and Google+
  2. November 27th 2009, 03:29 PM #2
    skeeter
    skeeter is offline
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,625
    Thanks
    425
    Quote Originally Posted by alexandrabel90 View Post
    how do you prove that the lim xe^(-x) tends to 0 as x tends to infinity?
    rewrite as ...

    \lim_{x \to \infty} \frac{x}{e^x}

    use L'Hopital
    Follow Math Help Forum on Facebook and Google+
« Help Simplifying a 2nd Derivative | Integral involving trig substitution »

Similar Math Help Forum Discussions

  1. Proving |a+b| = |a|+|b|
    Posted in the Algebra Forum
    Replies: 3
    Last Post: June 5th 2010, 08:53 AM
  2. Proving...
    Posted in the Advanced Algebra Forum
    Replies: 6
    Last Post: October 2nd 2009, 02:58 PM
  3. Proving an identity that's proving to be complex
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: July 21st 2009, 01:30 PM
  4. proving
    Posted in the Algebra Forum
    Replies: 3
    Last Post: January 15th 2009, 07:43 AM
  5. proving help
    Posted in the Algebra Forum
    Replies: 4
    Last Post: January 12th 2009, 04:42 PM

Search Tags


/mathhelpforum @mathhelpforum