考情分析一、排列、组合、二项式定理①掌握分类、分步计数原理,并能用它分析和解决一些简单的实际问题;②理解排列的意义,掌握排列数计算公式,并能用它解决一些简单的应用问题; Analysis of the situation of the first test, permutation, combination, binomial theorem 1 grasp the principle of classification, step-by-step counting, and can use it to analyze and solve some simple practical problems; 2 understand the meaning of the arrangement, master the calculation formula of array number, and can use It solves some simple application problems;