已知函数
,若方程
有四个不同的实数解
,
,
,
且
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69861b69067956a0b708d6f6d97d5099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338316b0fe50fdea0f2f75aec4c990dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291c25fc6a69d6d0ccfb8d839b9b4462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365b38a7689a8eede6820cd6f1fe952b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3604274ad6707a906eba371a9e884144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd5931e2727bbbb63c7f371769c964d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2021-01-28 22:46:38
|
【知识点】 根据函数零点的个数求参数范围
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单选题
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适中
(0.65)
解题方法
【推荐1】已知函数
,若函数
有两个不同的零点a,b,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13f4a2181abafed921acb1a215d70f9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc046a7b475b5130da69bf537226ec8.png)
A.a+b=1 | B.a+b=3m |
C.ab=1 | D.b=am |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】若函数
有两个零点,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33fbb2a43868473492974d2386cca2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次