已知命题p:“
,函数
无零点”,命题q:“方程
有两个不相等的正实数根”,若命题p与命题q有且只有一个真命题,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969f38df136f5a6b0e25f04346b7d0d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317529eea5231ae5f90ad02ee322af21.png)
更新时间:2021-11-23 19:18:50
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解答题-问答题
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适中
(0.65)
【推荐1】设
为实数,
,
,不等式
恒成立.
(1)若
为真命题,求实数
的取值范围;
(2)若
为真命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c44eb7d072bdf455cffa58e6288f03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cab2f87002ca6e08cd56ccd7fee140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dcc7158376726821233f29077555a3e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39967dc97238fb3a21f182014fc89214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解答题-问答题
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适中
(0.65)
名校
【推荐2】已知命题
方程
所表示的曲线为焦点在x轴上的椭圆;命题
实数t满足不等式
.
(1)若命题p为真,求实数t的取值范围;
(2)若“命题p为真”是“命题q为真”的充分不必要条件,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02c3d7d62473d186b3f90f01adc7af0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633ee8d7c21514cfdd4b9dae7ea7b4c8.png)
(1)若命题p为真,求实数t的取值范围;
(2)若“命题p为真”是“命题q为真”的充分不必要条件,求实数a的取值范围.
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解答题-问答题
|
适中
(0.65)
名校
【推荐1】已知二次函数
对任意
,有
,函数
的最小值为
,且
.
(1)求函数
的解析式;
(2)若方程
在区间
上有两个不相等实数根,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545931b962cf570712d04888b57093f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594af9f419149064dc23a04cd911ea92.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c3d46e0b29ee64fb27419f99963d5b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094cba781181aeb90752170e9ba6c94.png)
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适中
(0.65)
解题方法
【推荐2】已知函数
,
.
(1)若
在区间
上单调递增,求m的取值范围;
(2)求
在区间
上的最小值
;
(3)讨论
在区间
上的零点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28242c171db7b232bf7483b9fdbd6f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7242b2ab643f9470da77e29d043b893.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d188ec2580e273ce87e51653a2177ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1987ecbd076d89da5ef1e2561d79d857.png)
(3)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e99bebf8db0d314aacb2cb1f09bf48c.png)
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