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Math Help - Graphing two functions

  1. #1
    Junior Member
    Joined
    Feb 2008
    Posts
    49

    Graphing two functions

    Graph both functions on the same coordinate system.

    f(x)=3^{x}

    f(x)=-3^{x}


    Can somebody help me convert the decimals in the tables into fractions?

    1)

    x/ f(x)
    -3 / .03704
    -2 / .11111
    -1 / .33333
    0 / 1
    1 / 3
    2 / 9
    3 / 27

    2)

    x/ g(x)
    -3/ -.037
    -2/ -.1111
    -1/ -.3333
    0/ -1
    1/ -3
    2/ -9
    3/ -27

    Also...are these tables for the functions correct?

    Thanks in advance!
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  2. #2
    Junior Member
    Joined
    Feb 2008
    From
    Melbourne
    Posts
    27
    Quote Originally Posted by mt_lapin View Post
    Graph both functions on the same coordinate system.

    f(x)=3^{x}

    f(x)=-3^{x}


    Can somebody help me convert the decimals in the tables into fractions?

    1)

    x/ f(x)
    -3 / .03704
    -2 / .11111
    -1 / .33333
    0 / 1
    1 / 3
    2 / 9
    3 / 27

    2)

    x/ g(x)
    -3/ -.037
    -2/ -.1111
    -1/ -.3333
    0/ -1
    1/ -3
    2/ -9
    3/ -27

    Also...are these tables for the functions correct?

    Thanks in advance!
    It would of been simpler to just work them out without using a calculator if you wanted fractions...

    get you started off....

    f(x)=3^(x)

    f(-3)=3^(-3)
    f(-3)=1/(3^(3))
    f(-3)=1/27

    it's very simple mental maths i think you may have some gaps in your learning when it comes to indices i would ask for some help =] because they are very important....

    Indices Menu

    may want to read that
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