题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024500-56551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024500-29645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024500-35487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024500-78909.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024500-68600.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024500-41264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024500-61915.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
答案
解析
试题分析:直线
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024501-66722.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024501-15619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024500-29645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024501-83082.png)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024501-25252.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024501-99473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024502-56038.png)
依题意,切点坐标为
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024502-29781.png)
又根据导数的几何意义知:切点处的导数值就是直线
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024502-85668.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024502-25007.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024502-51028.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024501-25252.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024502-83987.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024503-71450.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024503-83738.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024439-31614.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024439-77013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024439-55129.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024439-37694.png)
(1)若函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024440-63143.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024440-19278.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024440-98114.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024440-85654.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024441-52390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024441-33952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024441-88989.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024423-11150.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024424-46733.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024424-16778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024424-66168.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024424-18854.png)
(2)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024424-41592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024425-18526.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024425-66224.png)
(3)设点C在函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024425-47179.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024425-95262.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024425-57702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024413-14764.png)
(1)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024414-71013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024414-87846.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024414-87846.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024414-10331.png)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024414-71013.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024414-28374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024414-23942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024358-57735.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024358-10806.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024358-17698.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024358-37647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024358-82594.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024359-83085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024359-27116.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024359-27993.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024359-40238.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024400-87029.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024400-89567.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024400-73615.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024400-52818.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024400-65676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024346-16805.png)
⑴求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024346-76615.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024346-66417.png)
⑵当
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024346-62644.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024346-15466.png)
⑶若
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024347-16089.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024347-30754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018024347-31605.png)
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