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Math Help - understanding this question

  1. #1
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    understanding this question

    the question is
    determine the coefficient of the x^(-41) term in the expansion of (3x - (1/2x^2)^28


    Does this just mean plug in x^-41 wherever theres an x???
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  2. #2
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    (3x - (1/2x^2)^28
    What?!


    Does this just mean plug in x^-41 wherever theres an x???
    What?!
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  3. #3
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    Quote Originally Posted by probowl8885 View Post
    the question is
    determine the coefficient of the x^(-41) term in the expansion of (3x - (1/2x^2)^28
    In the expansion of that you need to find the term \dbinom{28}{k}<br />
\left( {3x} \right)^k \left( {\frac{1}{{2x^2 }}} \right)^{28 - k} =\mathcal{C}x^{-41}.

    The value for \mathcal{C} is what you are looking for.
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