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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Originally Posted by acc 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 $\displaystyle {11 \choose r} x^{11 - r} y^r$. a) If 11 - r = 2 then r = .... Therefore k = .... b) If r = 11 then k = ....
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