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Math Help - inverse of these functions

  1. #1
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    inverse of these functions

    Could someone please just confirm if my answers are correct im looking for the inverse of the following function. (this is for a programming assignment x is a variable i will be taking from the user then subbing into formulas)


    f(x)= 3x+2
    g(x)= 8x^3


    inverse of f(x) = (x-2)/3;

    inverse of g(x) =cubed root of 8 * x

    that second one is wrong i think, i've been looking at vids online but i cant figure out how to inverse 8x^3 could any one help me
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  2. #2
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    Re: inverse of these functions

    Quote Originally Posted by ronanbrowne88 View Post
    Could someone please just confirm if my answers are correct im looking for the inverse of the following function. (this is for a programming assignment x is a variable i will be taking from the user then subbing into formulas)
    f(x)= 3x+2
    g(x)= 8x^3
    inverse of f(x) = (x-2)/3;
    inverse of g(x) =cubed root of 8 * x
    that second one is wrong i think, i've been looking at vids online but i cant figure out how to inverse 8x^3 could any one help me
    The second one is correct. It could be written as 2x because \sqrt[3]{8}=2.
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