Results 1 to 2 of 2

Math Help - [SOLVED] inverse of a function

  1. #1
    Newbie
    Joined
    Feb 2009
    Posts
    5

    [SOLVED] inverse of a function

    I think that I did this right but I am unsure
    2x-3/x+1
    =x-3/x+2
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member mollymcf2009's Avatar
    Joined
    Jan 2009
    From
    Charleston, SC
    Posts
    490
    Awards
    1
    Quote Originally Posted by roachbeats View Post
    I think that I did this right but I am unsure
    2x-3/x+1
    =x-3/x+2
    You are close, you just have sign errors:

    Starting with

    y = \frac{2x-3}{x+1}

    Switch your x & y terms:

    x =  \frac{2y-3}{y+1}

    x(y+1) = 2y-3

    xy - 2y = -x-3

    y(x-2) = -x-3

    y = \frac{-x-3}{x-2}
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] inverse of a function
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: February 11th 2010, 12:23 PM
  2. [SOLVED] Inverse Function
    Posted in the Calculus Forum
    Replies: 7
    Last Post: January 14th 2010, 09:03 AM
  3. [SOLVED] inverse of an ln function
    Posted in the Calculus Forum
    Replies: 1
    Last Post: September 28th 2009, 11:58 AM
  4. [SOLVED] Formula for inverse function
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: January 29th 2009, 05:04 AM
  5. [SOLVED] Inverse Function Problem
    Posted in the Algebra Forum
    Replies: 1
    Last Post: September 21st 2005, 11:27 PM

Search Tags


/mathhelpforum @mathhelpforum