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Math Help - inverse

  1. #1
    Member vernal's Avatar
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    inverse

    Hi , please help me.

    is it true Always?




    I dont know. because i see




    when is it ??

    thanks
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  2. #2
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    Re: inverse

    f(x)=x^2 isn't one to one for all x and so doesn't have an inverse for all x. You need to restrict x to a given domain over which it is one to one
    For example f(x)=x^2, x>0.
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  3. #3
    Member vernal's Avatar
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    Re: inverse

    Quote Originally Posted by biffboy View Post
    f(x)=x^2 isn't one to one for all x and so doesn't have an inverse for all x. You need to restrict x to a given domain over which it is one to one
    For example f(x)=x^2, x>0.
    thanks . if f is one to one then is it true always?

    inverse-gif.latex.gif
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  4. #4
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    Re: inverse

    Yes it is.
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