若以函数
的图像上任意一点
为切点作切线
,
图像上总存在异于
点的点
,使得以
为切点的直线
与
平行,则称函数
为“美函数”,下面四个函数中是“美函数”的是_________ .
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b328c034bc234f2e78beb36468216d.png)
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1281dafd96f19307b1ed30f786bbb8e1.png)
③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c65d71e57e6e7697e2f627dcd58583.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6f5adf13b4214666292dd64b947741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af405a054bfe7fb7ce40e48d816467e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34b328c034bc234f2e78beb36468216d.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1281dafd96f19307b1ed30f786bbb8e1.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c65d71e57e6e7697e2f627dcd58583.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc877e18ddca2a1a06a9b74fd6b6c588.png)
更新时间:2021-03-06 17:35:08
|
【知识点】 两条切线平行、垂直、重合(公切线)问题
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填空题-单空题
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适中
(0.65)
解题方法
【推荐1】已知函数
图像在点
和点
处的两条切线互相垂直,若
,则实数a的范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12bece3dd89e27bf07615aa3278ba3bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45dddee525114c09ee0d1205aed6e7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b3b54e0dcdc081d45fb3df933cddc29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d988f113c0586f1873762270f13e80a.png)
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适中
(0.65)
名校
【推荐2】已知直线
,分别与直线
和曲线
交于点M,N两点,则线段MN长度的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4d12362d4b8dd25813953e1c5a94b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e84049095dad63146c5f2585af7a7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64556964e96afd3147146c840157a6f6.png)
您最近一年使用:0次