当直线y=kx与曲线
有3个公共点时,实数k的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac52c95eabe6481726801a088e100667.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-11-22 09:11:52
|
相似题推荐
单选题
|
适中
(0.65)
名校
解题方法
【推荐1】已知函数
,
,用
表示m,n中的最小值,设函数
,则函数
的零点个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23a6c8a063c7fa0541a23399099ff9a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f79148313ab9c93540fca28dc3da6574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfae93c749a4725c30bf5fba3d892522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d1bebc2eebab4a624ba215bbdf1827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74314814cdc6fb803abb4692458af131.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】函数
,若
,且
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e28a4034d3adaf0a28ce83cf08715b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fac3162e61b6491fb232fa0820c567d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba934874cc9f2ab272fdff67ea23bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67211139d253327245417a0b0e327c69.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】定义
,若
,则关于函数
的三个结论:
①该函数值域为
;②该函数在
上单调递减;③若方程
恰有四个不等的实数根,则m的取值范围是
.其中正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4244507aec87e3a6c6b46f61465a44bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0cd746ab14d4dc4dcc96ee61bc4907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
①该函数值域为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03db4ea1dcb63b22cf4e917df5db581e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724f1face977df2f57d4004e68d92b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eb2e46f49adba6036e2624639a1b966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】函数
若方程
有三个不同的实数根,则实数m的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e190078a797c8a81b1c0f49ce83dff88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b4874cf36b6082ba4d539ff3ee69a3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次