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Math Help - finding an inverse of a rational function :D

  1. #1
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    finding an inverse of a rational function :D

    Trying to find the inverse of y in the rational equation that's attached via image. There's the work I did that's also attached. Can anyone spot what I did wrong please?
    Attached Thumbnails Attached Thumbnails finding an inverse of a rational function :D-capture.png   finding an inverse of a rational function :D-photo0012.jpg  
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  2. #2
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    Re: finding an inverse of a rational function :D

    After you have swapped x and y you need to solve for y, not x.

    Have another go at it.
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  3. #3
    Member rowe's Avatar
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    Re: finding an inverse of a rational function :D

    Look at your answer in the screenshot, your function f^{-1} seems to be independent of any x. The computer is expecting it in your definition...
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