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Math Help - Pre-Calc

  1. #1
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    Pre-Calc

    State whether the function f has an inverse. If f^-1 exsists, find a rule for f^-1(x) and show that f(f^-(x))= f^-1(f(x))=x

    1. f(x)= 1/x


    thank you!
    (sorry if its confusing to read)
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by ep78 View Post
    State whether the function f has an inverse. If f^-1 exsists, find a rule for f^-1(x) and show that f(f^-(x))= f^-1(f(x))=x

    1. f(x)= 1/x


    thank you!
    (sorry if its confusing to read)
    if an inverse exists, this is how to find it

    you have y = 1/x

    for the inverse function, switch x and y and solve for y. then check that it has all the properties of an inverse function
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  3. #3
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    wow..thats so easy..haha thank you!
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