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Math Help - Functions

  1. #1
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    Cool Functions

    Okay. I have done all these problems and I would like it if some one put all the answers up so i can see if i'm right

    Find g[h(x)] and h[g(x)]
    1.g(x)=x+4
    h(x)=x+9


    2. g(x)=|x|
    h(x)= x - 3


    3.g(x)=x^2-4
    h(x)=x+1


    if f(x) =x^2, g(x)=3x, and h(x) = x-1 find each of the following
    4. g[f(x)]

    5.[f o h](3)

    6.[f o h](-2)

    Find the inverse of each function
    7. I already know I got 7 right

    8. g(x)= (-3x+1)/2

    9. h(x) = 4x^2 +12x + 9

    Are the following functions inverses

    10. f(x) = (2x-8)/2

    11. g(x) = x +4
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  2. #2
    MHF Contributor
    skeeter's Avatar
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    Quote Originally Posted by thisishard View Post
    Okay. I have done all these problems and I would like it if some one put all the answers up so i can see if i'm right

    Find g[h(x)] and h[g(x)]
    1.g(x)=x+4
    h(x)=x+9


    2. g(x)=|x|
    h(x)= x - 3


    3.g(x)=x^2-4
    h(x)=x+1


    if f(x) =x^2, g(x)=3x, and h(x) = x-1 find each of the following
    4. g[f(x)]

    5.[f o h](3)

    6.[f o h](-2)

    Find the inverse of each function
    7. I already know I got 7 right

    8. g(x)= (-3x+1)/2

    9. h(x) = 4x^2 +12x + 9

    Are the following functions inverses

    10. f(x) = (2x-8)/2

    11. g(x) = x +4
    Sorry, but that's not the way it works here at MHF ... why don't you post your "answers" so someone may check them?
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