https://zhuanlan.zhihu.com/p/33365167
https://wenku.baidu.com/view/3871fd1455270722192ef77d.html
https://www.zhihu.com/question/389375507/answer/1169157083
https://baijiahao.baidu.com/s?id=1636241233757984085&wfr=spider&for=pc
https://zhuanlan.zhihu.com/p/63057165
http://www.docin.com/p-1821557729.html
http://lanqi.org/skills/18618/
https://www.zhihu.com/question/339199415
https://www.beichengjiu.com/mechanicalengineering/338334.html
https://wenku.baidu.com/view/860f9f3d0066f5335a8121ec
与指数平均、幂平均相关的几个不等式.pdf