名校
1 . 已知
有两个不相等的负实数根,
方程
无实数根.
(Ⅰ)若
为真,求实数
的取值范围;
(Ⅱ)若
为假
为真,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d212710524b1bfc8f0267a2aa17ab08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf5f1f93ce25d7d88eaea6381c7ef0ea.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2016-12-03更新
|
2123次组卷
|
3卷引用:江苏省南京市江浦高级中学2020-2021学年高一上学期检测(三)数学试题
解题方法
2 . 已知命题p:方程x2+mx+1=0有两个不相等的实根;q:不等式4x2+4(m–2)x+1>0的解集为R.
(1)若命题q为真,求实数m的取值范围.
(2)若命题“p且q”和“非p”为假,求实数m的取值范围
(1)若命题q为真,求实数m的取值范围.
(2)若命题“p且q”和“非p”为假,求实数m的取值范围
您最近一年使用:0次
13-14高二下·江苏盐城·期中
3 . 设
:函数
在
内单调递减;
:曲线
与
轴交于不同的两点.
(1)若
为真且
为真,求
的取值范围;
(2)若
与
中一个为真一个为假,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://img.xkw.com/dksih/QBM/2016/10/22/1573089691934720/1573089698390016/STEM/8c4e6c082e45451a982ceb13552d0fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea44ef4e158a7d4df006c9e61f12988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822e1d5acaa60803c97eec89a903183d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
13-14高二下·广东湛江·期末
名校
4 . 设命题
:“若
,则
有实根”.
(1)试写出命题
的逆否命题;
(2)判断命题
的逆否命题的真假,并写出判断过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf105efd4cf5f580d0561e54d923e347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0a7696e876d0f31bbd21b1046ab511.png)
(1)试写出命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(2)判断命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
您最近一年使用:0次
11-12高二下·福建泉州·期中
5 . 已知
,对
:
和
是方程
的两个根,不等式
对任意实数
恒成立;
:函数
有两个零点,求使“
且
”为真命题的实数的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d1dbacb32c6aa64b346cfc40c5e7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.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/54049409a9802e8bc9349aff16b9b397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38907bdf6eb2338526cf3ea136f85207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104eb5528114b40a40962db415c803c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b8cfec48a91a94f89fff13cc56bb26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
您最近一年使用:0次
11-12高二下·江苏扬州·期中
解题方法
6 . 已知命题p:函数
在(0,+∞)为减函数,命题q:复数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762e5af3197f712df3bc06841a113950.png)
在复平面内的对应点在第三象限.如果p或q为真命题,p且q为假命题,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da668452bf94a7df60422815ae3b3d07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762e5af3197f712df3bc06841a113950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae676c936b91af769360c2624f70e532.png)
您最近一年使用:0次