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Calculate the coefficient of x^14 y^4 in the expansion of (x + y)^18.
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A. 3,060
B. 3,600
C. 1,001
D. 1,008
@ganeshie8
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I think C.
do uuuu no?
(x+y)^18 solution: k x^(n-m) * y^m n = 18, m = 4 [ n! / (n-m)!*m! ] * (x^14)(y^4) [ 18! / (14)!*4! ] * (x^14)(y^4) https://answers.yahoo.com/question/index?qid=20120419220121AAuzCTI
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