Tedium
2021-03-18T08:07:37+00:00
[img]https://img.nga.178.com/attachments/mon_202103/27/-7Q16t-2b4hKsT3cSsg-dr.jpg.medium.jpg[/img]
这样？
[img]https://img.nga.178.com/attachments/mon_202103/27/-7Q16t-atb6KxT3cSsg-jv.jpg.medium.jpg[/img]
你观察分母，等价无穷小是二阶的，所以你分子泰勒展开到二阶就行
[quote][pid=503386417,26078680,1]Reply[/pid] Post by [uid=23414403]Hali_008[/uid] (2021-03-27 16:14):
这样？
[img]https://img.nga.178.com/attachments/mon_202103/27/-7Q16t-atb6KxT3cSsg-jv.jpg.medium.jpg[/img][/quote]等价无穷小啊，老哥你这错的也太离谱了[s:ac:喷][s:ac:喷]
[img]https://img.nga.178.com/attachments/mon_202103/27/-7Q16t-g6gZ2fT3cSqo-zk.jpg.medium.jpg[/img]
[quote][pid=503387328,26078680,1]Reply[/pid] Post by [uid=60426425]祝踏岚只吃竹笋炒肉[/uid] (2021-03-27 16:19):
你观察分母，等价无穷小是二阶的，所以你分子泰勒展开到二阶就行[/quote]不用展开，上面两个ln直接合并就行