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Math Help - Proof involving functions

  1. #1
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    Proof involving functions

    f(x)= a/x + b , x is real, x does not equal 0, b or -a/b

    ff(x) = f^-1(x)

    prove that a + b^2 = 0


    Would really appreciate a hint!

    Thanks
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  2. #2
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    Re: Proof involving functions

    please do not double post ...

    Proof involving functions
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