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Math Help - expansion

  1. #1
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    expansion

    Please help I am having trouble with this question....

    In the expansion of , (x-3/x^2)^9 find the following:
    a) the general term in simplified form
    b) the term containing x^6
    c) the constant term
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  2. #2
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    Re: expansion

    For the expansion of \displaystyle (x+y)^n

    The general term T_r can be found

    \displaystyle T_{r+1} = ^nC_rx^{n-r}y^r,  \forall n\in \mathbb{Z}^+
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  3. #3
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    Re: expansion

    Where do I get the "r" from?
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  4. #4
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    Re: expansion

    It is the 'rth' term, which represents the general term.
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  5. #5
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    Re: expansion

    ok what about determining the term containing x^6?
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  6. #6
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    Re: expansion

    Quote Originally Posted by aprinzen View Post
    ok what about determining the term containing x^6?
    Have you looked at any examples at all that are similar to your question? Perhaps in your class notes or textbook ....?

    Before you can be helped any further, you need to show what you got for the general term. If you cannot get the general term, you need to show what you've tried and where you get stuck.
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