10 2020 档案

需求弹性

摘要：![](https://img2020.cnblogs.com/blog/1494092/202010/1494092-20201011192429373-177098494.png) 阅读全文

posted @ 2020-10-11 19:25 jojoword 阅读(209) 评论(0) 推荐(0) 编辑

求偏导

摘要：![](https://img2020.cnblogs.com/blog/1494092/202010/1494092-20201011190924842-544166511.png) 阅读全文

posted @ 2020-10-11 19:10 jojoword 阅读(226) 评论(0) 推荐(0) 编辑