76,77毫无思路,跳过
78,总算写出来一题了,什么为什么答案1/x积分出来没有绝对值
不管了就当对了![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon20.png)
79,看出来是x当未知函数y当自变量,但是套公式一积分
,有点难积pass![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon33.png)
80,简简单单二次可降阶,遭,算出来有两个系数没法定,看了眼答案居然是直接拿y和x取极限![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon27.png)
![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon27.png)
81,看了眼感觉待定系数有点难,微分算子启动
结果算了一半有理式不会恒等变形,卒![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon9.png)
两页纸,两题没思路,其他的要不东错一点要不西错一点,真是麻麻的了,这就是你李老师的660呀![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon9.png)
![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon9.png)
![](http://tiebapic.baidu.com/forum/w%3D580/sign=18517ec270d3d539c13d0fcb0a86e927/1c1c95cad1c8a78618ac14322109c93d70cf500f.jpg?tbpicau=2024-07-12-05_6eb21f396ea10345f466c61b51ba549d)
78,总算写出来一题了,什么为什么答案1/x积分出来没有绝对值
![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon32.png)
![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon20.png)
79,看出来是x当未知函数y当自变量,但是套公式一积分
![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon10.png)
![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon33.png)
80,简简单单二次可降阶,遭,算出来有两个系数没法定,看了眼答案居然是直接拿y和x取极限
![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon27.png)
![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon27.png)
81,看了眼感觉待定系数有点难,微分算子启动
![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon95.png)
![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon9.png)
两页纸,两题没思路,其他的要不东错一点要不西错一点,真是麻麻的了,这就是你李老师的660呀
![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon9.png)
![](https://gsp0.baidu.com/5aAHeD3nKhI2p27j8IqW0jdnxx1xbK/tb/editor/images/client/image_emoticon9.png)
![](http://tiebapic.baidu.com/forum/w%3D580/sign=18517ec270d3d539c13d0fcb0a86e927/1c1c95cad1c8a78618ac14322109c93d70cf500f.jpg?tbpicau=2024-07-12-05_6eb21f396ea10345f466c61b51ba549d)