已知p:
,q:x>a2-2a-1
(1)若
为真,求
的取值范围;
(2)若
是
的充分不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25a2c324084796960af8d78f82a8a930.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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:2021-08-24 20:55:33
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【推荐1】已知
.
(1)若
是
的充分条件,求实数
的取值范围;
(2)若
,命题
、
其中一个是真命题,一个是假命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/030824e0f94a71b364c324eea90413d8.png)
(1)若
![](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/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7a1d739890a8951586e23b78b035bc.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/81dea63b8ce3e51adf66cf7b9982a248.png)
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解题方法
【推荐2】是否存在实数
,使
是
的充分条件?若存在,求出
的取值范围;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11a749fcb01499232ecf236764bbc90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6749db809dd84c2cfe5c47bea121e356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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名校
【推荐1】设命题
,命题
关于x的方程
有实根.
(1)若
为真命题,求
的取值范围;
(2)若“![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/a89ac7e7922c46a3b2c400bdd7725ad1.png)
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/9cf02454d806486cbbfc07fe885d349d.png)
”为假命题,且“![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/a89ac7e7922c46a3b2c400bdd7725ad1.png)
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/68800561734946d2910edd675371625a.png)
”为真命题,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/8048f670d6c74b5da61243367ef58317.png)
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/f997c8b0d7e64ea98bcff1bf4c0f483d.png)
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/29f70c7bc11e4cf5ac420fca536fb825.png)
(1)若
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/a89ac7e7922c46a3b2c400bdd7725ad1.png)
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/03e1bce7bfaa4316b762f9e622f3ba0f.png)
(2)若“
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/a89ac7e7922c46a3b2c400bdd7725ad1.png)
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/9cf02454d806486cbbfc07fe885d349d.png)
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/f1f589277cd24bb7a8116eb9e5628241.png)
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/a89ac7e7922c46a3b2c400bdd7725ad1.png)
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/68800561734946d2910edd675371625a.png)
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/f1f589277cd24bb7a8116eb9e5628241.png)
![](https://img.xkw.com/dksih/QBM/2016/1/18/1572442262896640/1572442268598272/STEM/03e1bce7bfaa4316b762f9e622f3ba0f.png)
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【推荐2】已知
:
,
:
.
(1)若
为真,求
的取值范围;
(2)若
是
的充分不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db84def74d904aafe42dfe39cc70ef3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f0573d17322360c2edf25ef4fffd02.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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)
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【推荐1】已知关于x的不等式
的解集是
,求关于x的不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae6c08e4c2f5db9a595dcdbd99f9896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02e1c9c97de9198d47306216e9961b80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7e0c0d14e691140c497c310d85758a.png)
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【推荐2】设全集
,集合
,集合
.
(1)求
;
(2)有三个条件:①
,②
,③“
”是“
”的必要条件,从这三个条件中任选一个作为已知条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860ebb6f76cd3cb9a265dfc233002a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1deb5147fbdc85fd87e3d88e6e19af3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71714a3d9fae12e5a423b90532a839ab.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d671d4ce46f03f75a328734f2acbac91.png)
(2)有三个条件:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421e675c78c65373378ddf2928c808af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbbe46a98a8fdebfc46fcbc45dc88e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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