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Math Help - Functions

  1. #1
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    Functions

    Prove: If f is invertible, f^(-1)<dot> f = Id_(domf), f <dot> f^(-1) = Id_(ranf).

    <dot> is the circle that means composed and _ denotes subscript. Thanks.
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  2. #2
    MHF Contributor

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    What is the definition of the "inverse" of a function, f?
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