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Math Help - Binomial Theorem.

  1. #1
    acc
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    Binomial Theorem.

    If the numerical coefficients are disregarded, the following terms appear in the expansion of (x + y)11

    State the value of k in each case:

    a) x2 yk

    b) xk y11
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  2. #2
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    Quote Originally Posted by acc View Post
    If the numerical coefficients are disregarded, the following terms appear in the expansion of (x + y)11

    State the value of k in each case:

    a) x2 yk

    b) xk y11
    The general term is {11 \choose r} x^{11 - r} y^r.

    a) If 11 - r = 2 then r = .... Therefore k = ....

    b) If r = 11 then k = ....
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