浙江大学：《离散数学》课程教学资源（PPT课件讲稿）第四章 计数原理（4.1-4.2-4.3）

example2 计数原廷 How many functions are there from a set with m elements to one with n elements nn。。n=nm 2/24/202111:38PM Deren Chen, Zhejiang UniV

计数原理 2/24/2021 11:38 PM Deren Chen, Zhejiang Univ. 6 How many functions are there from a set with m elements to one with n elements ? example2 nn…n = nm

example3 计数原廷 How many one-to-one functions are there firom a set with m elements to one with n elements n(n-1)(n-2)(n-m+1) 2/24/202111:38PM Deren Chen, Zhejiang UniV

计数原理 2/24/2021 11:38 PM Deren Chen, Zhejiang Univ. 7 How many one-to-one functions are there from a set with m elements to one with n elements ? example3 n(n-1)(n-2)…(n-m+1)

Example 4 计数原廷 例11多重循环程序 2/24/202111:38PM Deren Chen, Zhejiang UniV

计数原理 2/24/2021 11:38 PM Deren Chen, Zhejiang Univ. 8 例11 多重循环程序 Example 4