题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017120005-98456.png)
A.x+y-1=0 |
B.x-y-1=0 |
C.x+y+1=0 |
D.x-y+1=0 |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017120005-49376.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017120005-21156.png)
切线的斜率为
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017120005-20098.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017120006-79956.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017120006-51133.png)
所以直线l的方程为x-y-1=0.
核心考点
试题【已知函数.若直线l过点(0,-1),并且与曲线y=f(x)相切,则直线l的方程为( )A.x+y-1=0B.x-y-1=0C.x+y+1=0D.x-y+1】;主要考察你对导数的意义等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017120000-29978.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017120000-34500.png)
A.-1 |
B.1 |
C.-2 |
D.2 |
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115939-44427.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115939-75508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115939-25288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115939-79976.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115939-33314.png)
(1)已知
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115940-49354.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115940-87763.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115940-74380.png)
(2)若存在
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115940-14778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115939-75508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115940-32391.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115941-96206.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115941-22833.png)
(3)设函数
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115941-66676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115941-47168.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115941-14828.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115942-18933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115942-58250.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115941-14828.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115942-55788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115942-73346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115943-35017.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115943-45006.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115943-42851.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115941-22833.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115922-80431.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115922-22613.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115923-26942.png)
(2)判断
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115923-37920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115923-78511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115923-92417.png)
(3)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115924-26900.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115923-92417.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115925-45596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115925-99616.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115926-91067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115926-85517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115926-37893.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115926-98579.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115926-42292.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115904-19491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115904-11446.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115904-19491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115904-21696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115905-89298.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115905-16126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115905-43822.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191017/20191017115906-31129.png)
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