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Math Help - Inverse Of Fuctions

  1. #1
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    Inverse Of Fuctions

    Hello anyone who may read this.

    I am currently having trouble grasping the concept of the inverse of fuctions.

    Take the problem: f(x)= 2/x-1
    For Instance
    I know you should switch the x and the y.. so I have

    x= 2/y-1

    From here is where I get lost.. I just don't understand how to get Y alone..

    Any help is appreciated.
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  2. #2
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    Quote Originally Posted by EddieG View Post
    Hello anyone who may read this.

    I am currently having trouble grasping the concept of the inverse of fuctions.

    Take the problem: f(x)= 2/x-1
    For Instance
    I know you should switch the x and the y.. so I have

    x= 2/y-1

    From here is where I get lost.. I just don't understand how to get Y alone..

    Any help is appreciated.
    => x(y - 1) = 2

    => xy - x = 2

    => xy = 2 + x

    => y = (2 + x)/x
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  3. #3
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    So you can just divide out the X even tho it is being mult by the Y? (XY)
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  4. #4
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    Quote Originally Posted by EddieG View Post
    So you can just divide out the X even tho it is being mult by the Y? (XY)
    No, I did that just to fool you.

    (Of course you can!)
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