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1、精選優(yōu)質(zhì)文檔-傾情為你奉上二項(xiàng)式定理的證明利用數(shù)學(xué)歸納法證明二項(xiàng)式定理：證明： （1）當(dāng)n1時，左邊(ab)1ab， 右邊ab左邊右邊，所以等式成立（2）假設(shè)當(dāng)nk時等式成立，即那么，當(dāng)nk1時，利用組合數(shù)旳兩個重要性質(zhì)可得即nk1時等式也成立根據(jù)（1）和（2），可知對于任意正整數(shù)n，等式都成立一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一

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