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二项式定理是每年高考的必考内容,笔者研究了近几年有关二项式定理的高考试题,发现二项展开式系数问题占到了一定的比例,下面就二项展开式系数问题常见的题型及其解题方法归类如下.1.通项公式法求展开式的特定项(常数项、中间项、有理项、最大项等)及这些特定项的系数问题,是近
The Binomial Theorem is a must-examination content for the annual college entrance examination. The author studied the high examination questions related to the binomial theorem in recent years and found that the problem of the binomial expansion coefficient occupies a certain proportion. The following questions about the binomial expansion coefficient are common. The question types and their solution methods are categorized as follows. 1. The general term formula method is used to determine the specific items of the expansion (constant terms, intermediate terms, rational items, maximum items, etc.) and the coefficient problems of these specific items.