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Math Help - help with inverse

  1. #1
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    help with inverse

    I need help with this inverse problem...Im no good in math.


    f(x)=(x+2)^3-4
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  2. #2
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    Quote Originally Posted by bastropgarl View Post
    I need help with this inverse problem...Im no good in math.


    f(x)=(x+2)^3-4
    y = (x+2)^3 - 4

    The key is to isolate x in terms of y.

    x = \sqrt[3]{y+4} - 2

    Then replace x with f^{-1}(x) and y with x

    f^{-1}(x) = \sqrt[3]{x+4} - 2
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