解题方法
1 . 设函数
为常数
,若方程
的根都在区间
内,且函数
在区间
上单调递增,则
的取值范围是
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421897945088/STEM/a1221035070344efb705df93845ffd29.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421897945088/STEM/e574450be54d45e4a201f74a63379c13.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421897945088/STEM/d642184f74e24645bb90c06df0bb6d31.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421897945088/STEM/d77c1584a2bd4ba482078ce56ba04457.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421897945088/STEM/fd004df5c5b94bbf8ca57ed9ff08d57b.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421897945088/STEM/b07c34d7375b466fa48ada4a2216b671.png)
![](https://img.xkw.com/dksih/QBM/2016/1/6/1572421892243456/1572421897945088/STEM/9c3ccdfa236d48df8a94ed0d2b01dcbf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
584次组卷
|
3卷引用:2015-2016学年黑龙江大庆一中高二下第二次段考理数学卷
解题方法
2 . 若函数f(x)=lnx-
ax2-2x存在单调递减区间,则实数a的取值范围是
![](https://img.xkw.com/dksih/QBM/2015/3/12/1572001232568320/1572001238147072/STEM/0dce7f039eaa4e009d0c304a0f36d59d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次