Results 1 to 4 of 4

Math Help - does anyone know what this means?

  1. #1
    Newbie
    Joined
    Jun 2008
    Posts
    6

    Question does anyone know what this means?

    Given to me by my math teacher. We were told it was some kind of proof but I dont really understand what it means...

    pf (f^1 (x)) = x


    any ideas?

    Thanks guys
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member Matt Westwood's Avatar
    Joined
    Jul 2008
    From
    Reading, UK
    Posts
    824
    Thanks
    33
    What's the context? "pf" could mean "probability function", apart from that I haven't a clue. What level of mathematics - grade school, high school, university, postgrad? What field: probability/statistics, analysis, calculus, graph theory, topos theory, what?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jun 2008
    Posts
    6
    College pre-calculus and we are working on function, maxima, stretching, that kind of thing. thank you for answering...
    Follow Math Help Forum on Facebook and Google+

  4. #4
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by tara View Post
    Given to me by my math teacher. We were told it was some kind of proof but I dont really understand what it means...

    pf (f^1 (x)) = x


    any ideas?

    Thanks guys
    ok, so i do not know what "pf" is supposed to mean. perhaps you copied it wrong. this may have to do with inverse functions, that's the closest thing i see to this.

    note that if f(x) and f^{-1}(x) (the usual notation for inverse functions) are inverses of each other, then:

    f(f^{-1}(x)) = x and f^{-1}(f(x)) = x ..........that is, the composition of a function and it's inverse remains fixed. whatever the input is, that's what the output will be
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 0
    Last Post: December 14th 2011, 06:02 AM
  2. Means
    Posted in the Statistics Forum
    Replies: 1
    Last Post: January 20th 2010, 09:32 PM
  3. I don't know what this means???
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: July 30th 2009, 12:09 AM
  4. does anyone know wht this means?
    Posted in the Calculus Forum
    Replies: 4
    Last Post: November 15th 2007, 06:21 PM
  5. Help with Means
    Posted in the Statistics Forum
    Replies: 1
    Last Post: October 25th 2007, 08:53 AM

Search Tags


/mathhelpforum @mathhelpforum