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二项式最大系数性质。按教材叙述方式证明教学比较困难,以致有的老师干脆直接给出最大值所在项的结论(避开了难点!).笔者在给出这条性质时,构想出较易理解的别证.
Binomial maximum coefficient property. It is difficult to prove the teaching according to the narrative way of teaching materials, so that some teachers simply give the conclusion of the item with the largest value (to avoid the difficulties!). When the author gives this kind of character, he designs a more easily understandable evidence.