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Math Help - combining functions

  1. #1
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    combining functions

    I seem to run into another problem in my homework. (I could see it coming

    If:
    f (x) = 3(x+1)^2 (the last 2 means square)
    g (x) = (2/x) - 1

    what is (f *g)(x) (multiplication)


    thank you
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  2. #2
    Moo
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    Hello,

    Quote Originally Posted by zdenka View Post
    I seem to run into another problem in my homework. (I could see it coming

    If:
    f (x) = 3(x+1)^2 (the last 2 means square)
    g (x) = (2/x) - 1

    what is (f *g)(x) (multiplication)


    thank you
    If I'm not misreading :

    (f*g)(x)=f(x)*g(x)=3(x+1)^2 * (\frac 2x-1)=3(x+1)^2 * \frac{2-x}{x}

    It cannot be much simplified.. It depends on how you want it to be
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  3. #3
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    You read it correctly.

    thank you. I just never know when to stop the simplification and then I end up with a nonsense equation. I have one more combining question. I will post it in a bit.
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