二项式定理有关知识是每年高考必考内容之一,本文总结出了近年高考中的五大热点题型,供参考.一、通项运用型凡涉及到展开式的项及其系数(如常数项,x3项的系数等)问题,常是先写出其通项公式Tr+1=Crnan-rbr,然后再据题意进行求解,有时需建立方程才能得以解决.【例1】(2004年全国 The Binomial Theorem is related to knowledge is one of the contents of the annual college entrance examination. This article summarizes the five hot topics in the college entrance examination in recent years, for reference. First, the general term applies to the expansion of the items and coefficients (such as constants The problem of term, coefficient of x3, etc.) is often written first as its general formula Tr+1=Crnan-rbr, and then solved according to the meaning of the question. Sometimes it is necessary to establish an equation to be solved. [Example 1] (2004 National