Results 1 to 3 of 3

Math Help - Determining of the function is increasing or decreasing?

  1. #1
    Newbie
    Joined
    Oct 2013
    From
    new york
    Posts
    4

    Determining if the function is increasing or decreasing?

    g(x) = 5x-3.8/(5x-14.44)2

    I got the derivative: g'(x) = [(25x-72.7)2 - (50x-38)]/ (5x-14.44)4

    How do you find the intervals for this function?
    Last edited by bookish12; November 17th 2013 at 10:49 PM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member
    Joined
    Feb 2013
    From
    Saudi Arabia
    Posts
    440
    Thanks
    86

    Re: Determining of the function is increasing or decreasing?

    solve the numerator as equation to find the roots of g'(x) =0 then verify where the g'(x) is < 0 or >0 it is easy.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,887
    Thanks
    325
    Awards
    1

    Re: Determining if the function is increasing or decreasing?

    Quote Originally Posted by bookish12 View Post
    g(x) = 5x-3.8/(5x-14.44)2

    I got the derivative: g'(x) = [(25x-72.7)2 - (50x-38)]/ (5x-14.44)4

    How do you find the intervals for this function?
    Redo your derivative. A good check on this would be to write your function as g(x) = (5x - 3.8)(5x - 14.44)^{-2}

    -Dan
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. is this an increasing or decreasing function?
    Posted in the Calculus Forum
    Replies: 6
    Last Post: September 22nd 2012, 09:18 PM
  2. Increasing and Decreasing Function
    Posted in the Algebra Forum
    Replies: 3
    Last Post: August 22nd 2009, 05:33 AM
  3. when is function increasing/decreasing
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: March 29th 2009, 01:30 AM
  4. Increasing and Decreasing function given f'(x)
    Posted in the Calculus Forum
    Replies: 13
    Last Post: June 11th 2008, 11:27 PM
  5. Increasing and Decreasing function
    Posted in the Calculus Forum
    Replies: 2
    Last Post: December 4th 2007, 12:26 AM

Search Tags


/mathhelpforum @mathhelpforum