dillongoo
2020-08-17T14:08:33+00:00
[s:ac:羡慕]在看狄利克雷积分的时候突然想到这个问题的，有没有办法求出f(x)啊？
[img]https://img.nga.178.com/attachments/mon_202008/19/-7Q5-arogK1fT3cSsg-je.jpg.medium.jpg[/img][img]https://img.nga.178.com/attachments/mon_202008/19/-7Q5-ayhcKfT1kSac-ds.jpg.medium.jpg[/img]
[img]https://img.nga.178.com/attachments/mon_202008/19/-7Q5-arogK1fT3cSsg-je.jpg.medium.jpg[/img][img]https://img.nga.178.com/attachments/mon_202008/19/-7Q5-ayhcKfT1kSac-ds.jpg.medium.jpg[/img]