已知命题p:集合
为空集,命题q:不等式
恒成立.
(1)若p为真命题,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/c95081384979a7a2aa722c28df21621c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d8fca13bee2083cdb388705928ed2a.png)
(1)若p为真命题,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)
更新时间:2022-02-21 12:47:51
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【推荐1】在①
,
,②存在集合
,非空集合
,使得
,这两个条件中任选一个,补充在下面问题中,并求解问题中的实数
的范围.
问题:求解实数
的范围,使得命题
:
,
,命题
:__________有且只有一个真命题.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec37ac177bcc907225053c37b8e5dbe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51a8f5b169d49929b86a3cf091410d19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d14da2f3da3a952aacb0de8b4dc24dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea9a4259cca10c1f5af28e621ebafd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
问题:求解实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17f477dd06f836c070ffbd8908a3201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47dbb694e96dbd7221ac9499ddeb5d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
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【推荐2】已知函数
.
(1)若
有两个根
、
,且
,求a的值;
(2)若命题“
,
”为假命题,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cae1d8cc07c3678a15562e549d5f7c2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ca8069f479b414966c9ebff6c1430c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b12a4eecd249473a831d0ee472470240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9565876bc50bceb63e5793c8c67a9032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0e1de615010c1a08e48de9e38622a1.png)
(2)若命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a3d62fbf886953965eabafe792872f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa569d187359ed7ab26f61f338731a3.png)
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【推荐1】已知命题
:实数
满足
(其中
);命题
:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad26a31ecf27870db921b5896f28984.png)
(1)若
,
为真命题,求实数
的取值范围;
(2)若
是
的必要不充分条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df59131fbd68d68adf401a32970bd9aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad26a31ecf27870db921b5896f28984.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.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2】设命题
:实数满足
,其中
.命题
:实数
满足
.
(1)当
时,命题
,
都为真,求实数
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/b1dc823077f5a0767f65ee2187834039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3fedf3e1847bed8d2ea1a81a8eb07a8.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.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)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
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【推荐1】已知集合
.
(1)当
时,关于
的不等式组
没有实数解,求实数
的取值范围;
(2)若
,且关于
的不等式
的解集为
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d57c293ebc3b99cb7aff9b3e585dcdc7.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bc9551406faf1c4f1e444dbd66237b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2454a6dc18fdf2cde16cb1b096ea8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/811625bead5bd88970550be98125aa3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5258a748e0915550223745b9d4aa68f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a837165ca03f9e4ea8964979c95e3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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