1教学分析本节课是北师大版高中数学(选修2-3)第一章(计数原理),主要内容是二项式定理及其运用.它是初中多项式乘法公式的推广,研究的是一类特殊多项式——二项式乘方的展开式.通过本节的探究学习,不仅强化了之前刚学的组合等知识,也为学习后面概率中的二项分布做了很好的铺垫,具有承上启下的作用.本节知识具有较高的应用价值和思维训练价值,所以,教学中既要 1 Teaching Analysis This lesson is the first chapter of the Beijing Normal University Edition (Optional 2-3) mathematics (Elective 2-3), the main content is the binomial theorem and its application. It is the promotion of the polynomial multiplication formula of the junior middle school. A class of special polynomials - the expansion of binomial powers. Through this section of inquiry learning, not only the combination of previous knowledge just learned, but also for the study of the probability distribution of the binomial, made a good pave, It has the function of linking up and down. The knowledge in this section has high application value and thinking training value. Therefore, it is necessary to teach