Mecht0
2020-08-02T11:38:52+00:00
请问各位大佬注释部分的两个不等式怎么证明?已经想了一天了,还没有头绪
[img]https://img.nga.178.com/attachments/mon_202008/08/-7Q5-hn65ZyT3cSq5-cj.jpg.medium.jpg[/img]
[img]https://img.nga.178.com/attachments/mon_202008/08/-7Q5-hn65ZyT3cSq5-cj.jpg.medium.jpg[/img]