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Math Help - inverse fuction help !

  1. #1
    Newbie
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    Nov 2009
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    Grimsby, England
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    inverse fuction help !

    hi im struggling with this question and was wondering if anyone can help
    this is the question...

    find the inverse

    the function is defined by f(x) = ln(4x-1) , x>1/4

    all help is fully appriciated
    thank you
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  2. #2
    MHF Contributor
    Joined
    Mar 2007
    Posts
    1,240

    Talking

    Hint: What is the inverse of a logarthmic function?

    Rename as "y = ln(4x - 1)". Then convert to the equivalent exponential equation, and solve for "x=".
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