Evangele
2020-06-09T14:21:23+00:00
如题,小于二分之派 就变成一了 没看懂,求高数大神
[img]https://img.nga.178.com/attachments/mon_202006/11/-7Q5-4nbzZcT3cSnl-i6.jpg.medium.jpg[/img]
[img]https://img.nga.178.com/attachments/mon_202006/11/-7Q5-4nbzZcT3cSnl-i6.jpg.medium.jpg[/img]