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Math Help - Functions

  1. #1
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    Functions

    I don't know where I'm going with this. I think my reasoning is out of whack, can someone please explain this to me?


    Alright, so when f(x)=3, the x is a 1. And when x is a one over at the g(x) side where x is, it's a -1. So -1 x 3 = -3...B.
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  2. #2
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    Quote Originally Posted by A Beautiful Mind View Post
    I don't know where I'm going with this. I think my reasoning is out of whack, can someone please explain this to me?


    Alright, so when f(x)=3, the x is a 1. And when x is a one over at the g(x) side where x is, it's a -1. So -1 x 3 = -3...B.
    We aren't looking for when f(x)=3, we are looking for the value of f(x) AT x=3 Look at the table, and at x=3 we see that f(x)=2 which means that f(3)=2. Now because we have g(f(3)), we need to find g(x) AT f(3)=2. So the question is essentially asking for g(2)=?

    Looking at the table we see that g(f(3))=g(2)=-3 which is answer choice B.

    Is another way to look at it.
    Last edited by Kasper; July 9th 2009 at 10:51 AM.
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  3. #3
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    Nah, I got it. Thanks.
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