已知
:
,
,
:
,若
为真,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6422b9c2e93a91fe9e39ce4d9dabb0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f18a22e249faf318dbd19b9197fd4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86f9e15627d70ff94ecf40a5465f139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2021-07-09 17:39:04
|
相似题推荐
单选题
|
较易
(0.85)
解题方法
【推荐1】设命题
:函数
的定义域为
;命题
:不等式
对一切正实数均成立.如果命题“
或
”为真命题,且“
且
”为假命题,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad97689ee9fa85d07739c43eff45dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/087eec7a19ddedfa7e66919c0ae29a1f.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/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
解题方法
【推荐2】已知命题p:∃x∈R,(m+1)(x2+1)≤0,命题q:∀x∈R,x2+mx+1>0恒成立.若p∧q为假命题,则实数m的取值范围为
A.m≥2 | B.m≤-2或m>-1 |
C.m≤-2或m≥2 | D.-1<m≤2 |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
【推荐3】已知
,设
:函数
在R上单调递减;
:函数
的值域为R,如果“
且
”为假命题,“
或
”为真命题,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cec12441802f71e803efaf2c62ee588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e434d52b7741e42c21c2785eb07ffcaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb6833f8fb83c7e7db658ad4e541392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89bdf1717c68cfc8a306ee79757e7e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77b7c15b8559737e4b46b0357cee54e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e434d52b7741e42c21c2785eb07ffcaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89bdf1717c68cfc8a306ee79757e7e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e434d52b7741e42c21c2785eb07ffcaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89bdf1717c68cfc8a306ee79757e7e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3aa688caadfeb5bdf9c7dfecb5afa31.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
解题方法
【推荐2】设集合
,
,则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e926a1140af2dcfdb0f956064399df87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1abad6c0e7e6e82773e2a0b43d0a06ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81919684bc4047d376c7e57dc6c8f1c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
解题方法
【推荐1】下列函数的最小值为2的是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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【推荐2】世界公认的三大著名数学家为阿基米德、牛顿、高斯,其中享有“数学王子”美誉的高斯提出了取整函数
表示不超过
的最大整数,例如
.已知
,则函数
的值域为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/068bb59c16d730eecd7a67f92221ef80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9eac0c9d446e5ac1b89438b7b4739c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea69058d2f3c366e7314bd61fe519c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次