Results 1 to 4 of 4

Math Help - Compute the maximum value

  1. #1
    Banned
    Joined
    Dec 2008
    From
    Mauritius
    Posts
    523

    Compute the maximum value

    Question : Show that \frac{logx}{x} has a maximum value at x=e. Compute the maximum value
    ------------------------------------------------------
    Solution:

    x=e is the confusion what to do with it
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Lord of certain Rings
    Isomorphism's Avatar
    Joined
    Dec 2007
    From
    IISc, Bangalore
    Posts
    1,465
    Thanks
    6
    Since this is the calculus forum, differentiate and set the differentiated function to zero and solve for x. Justify the solution is a maxima.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Banned
    Joined
    Dec 2008
    From
    Mauritius
    Posts
    523
    but what should the values of x be .............
    I dont mind defferentiating but what should i putin the value of x
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor

    Joined
    Apr 2005
    Posts
    15,598
    Thanks
    1421
    Quote Originally Posted by zorro View Post
    but what should the values of x be .............
    I dont mind defferentiating but what should i putin the value of x
    He said solve for x! You don't "put in" any value of x.

    (Although, here, since you are given a value of x, x= e, you could put that in and see if the derivative is 0 there. You might also want to check that the second derivative is negative there (second derivative test) or that the first derivative is positive for x< e and negative for x> e (first derivative test).
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Compute p(A) where p(x) = ...?
    Posted in the Advanced Algebra Forum
    Replies: 3
    Last Post: September 6th 2011, 09:27 PM
  2. Compute the following sum.
    Posted in the Discrete Math Forum
    Replies: 2
    Last Post: May 6th 2010, 12:39 PM
  3. How can I compute E[max Xi \ X1<X2<X3]?
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: March 31st 2009, 09:10 AM
  4. can someone compute this for me
    Posted in the Algebra Forum
    Replies: 6
    Last Post: January 14th 2009, 03:17 PM
  5. Does not compute!
    Posted in the Algebra Forum
    Replies: 1
    Last Post: July 16th 2007, 10:47 AM

Search Tags


/mathhelpforum @mathhelpforum