已知
,
,
,
.
(1)若
为真命题,求
的取值范围;
(2)若
和
至少有一个为真命题,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248d3fb187b56abeb0317dee8ae6a010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8501bf1a3391f3da82fbe2d272cde6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bba9e2d7765b1cce1b2ae5d14e15d96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e66333d38861aaeb7e84316bdf6be23f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.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)
更新时间:2022-11-12 21:11:11
|
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解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】设命题
:存在
,不等式
成立;命题
:对任意
,不等式
恒成立.
(1)若
为真命题,求实数
的取值范围;
(2)若
有且只有一个为真命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790daaa89fc9d093f45023becf765697.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3967deaf0ed47a8e90a18bb2278f3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24aa16b780156e18f12baa2b8ee0f9a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8425de9c9f51dc8ca4704fa159ad0879.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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适中
(0.65)
名校
解题方法
【推荐2】已知命题
:函数
在
上单调递增;命题
:函数
在
上单调递减.
(Ⅰ)若
是真命题,求实数
的取值范围;
(Ⅱ)若
或
为真命题,
且
为假命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202bf1d9cb724a7db5055fd538390d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b2e67cd10ebbced3d964ab0dc5c298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d863101e1d5cbba00d8e0dba69a846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c880a292e77ec85d531c1b37e6feffe6.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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/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
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适中
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【推荐1】已知
,命题
,不等式
恒成立;命题
使得
成立
(1)若p为真命题,求实数m的取值范围;
(2)若
为假,
为真,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d6dea6ccf719cb1b71df3146a414cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2525a1f6275d4f45141503d076a011ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c8828f256807e1eff0ee6139a76a2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b51c4c086a784da730afb5438e21a9.png)
(1)若p为真命题,求实数m的取值范围;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐2】已知命题:“
,都有不等式
成立”是真命题.
(1)求实数
的取值集合
;
(2)设不等式
的解集为
,
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98a773f996f72659d4046f25bb264d6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8011097397078ab20250f2473cede41b.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)设不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a19448eb24d26b6a689d9f87a10b7370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9d50619b779c1056602f46b2a95e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐1】已知命题
,使
;命题
,使
.
(1)若命题p为假命题,求实数a的取值范围;
(2)若
为真命题,
为假命题,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fac11dd95cb4b78adb817fad02dedb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1fdf084e20c49b825bb5a2d9625fdbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/239408578e0d790b3834c187291e622d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b537924458ab70eafd8861b18fa1949.png)
(1)若命题p为假命题,求实数a的取值范围;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知“
,使等式
成立”是真命题.
(1)求实数
的取值集合
;
(2)设不等式
解集为
,若
是
的必要条件,求实数
的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572448671006720/1572448677314560/STEM/1bc4346ebb9e42109b9d946488bc33a9.png)
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572448671006720/1572448677314560/STEM/2f86cb48fb234ca6a429cafe09190b6a.png)
(1)求实数
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572448671006720/1572448677314560/STEM/8f4a954038654019a2d7a63d6d51a828.png)
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572448671006720/1572448677314560/STEM/09f8192b58c242768ca36b47d2d1a08d.png)
(2)设不等式
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572448671006720/1572448677314560/STEM/07a4453b67704d088ffeca6def62e687.png)
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572448671006720/1572448677314560/STEM/695305b97bd04e80b8f2d126cc1400b6.png)
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572448671006720/1572448677314560/STEM/f75e5a39d116453dae0398817d7cf96b.png)
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572448671006720/1572448677314560/STEM/39f5a18d400e447bb8dd608d6ebc04ad.png)
![](https://img.xkw.com/dksih/QBM/2016/1/20/1572448671006720/1572448677314560/STEM/4a9b0fb5b25446b7ba16b11194fb35e7.png)
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