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Math Help - Evaluating Functions

  1. #1
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    Evaluating Functions

    Hi everyone,

    I'm having a hard time with a math problem. It gets too messy for me.
    The given function is: F(t)= 4/t-3

    Asks to compute and simplify: (a) F(3y+4 / y) and (b) F(3y+4) / F(y)

    can please somebody help me with this?!

    Thanks in advance!

    **(attached is a .doc with the correct math notation of the functions.)
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  2. #2
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    Re: Evaluating Functions

    Quote Originally Posted by shadow90 View Post
    Hi everyone,

    I'm having a hard time with a math problem. It gets too messy for me.
    The given function is: F(t)= 4/(t-3)

    Asks to compute and simplify: (a) F[(3y+4) / y] and (b) F(3y+4) / F(y)

    can please somebody help me with this?!

    Thanks in advance!

    **(attached is a .doc with the correct math notation of the functions.)
    note ... please use grouping symbols.

    F(t) = \frac{4}{t-3}

    F\left(\frac{3y+4}{y}\right) = \frac{4}{\frac{3y+4}{y} - 3} = \frac{4y}{(3y+4) - 3y} = \frac{4y}{4} = y

    now ... you try (b)
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  3. #3
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    Re: Evaluating Functions

    First of all thank you very much skeeter.

    I tried (b) is it correct?

    Evaluating Functions-picture-1.jpg
    I don't know how to work the math notation on the forum
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  4. #4
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    Re: Evaluating Functions

    should be 3y+1 in the denominator
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