设集合
,
,若
,则实数a的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c58e1fd8be489438c326d564cd36ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f74e613f866b4307a6186d8a4f9aa2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89ab8fdaefe8f73f7ebc4489b1ba8303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2018-12-10 15:37:11
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相似题推荐
单选题
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适中
(0.65)
名校
【推荐1】已知集合
,集合
,集合
,若
,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02b0fb229cf7732ac04ea2de6ac624b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d912e75ef3071e4b85c4a7e9943c07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821e9666e063e755ec3e6fb1653b8bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d855660a3fed2a08f22db1232308eeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
解题方法
【推荐2】已知集合
,
,若
,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bb8a7cef606ee0224d3cc4db9598f9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a183daa7a35a56ec23141c9c8b063106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.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
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适中
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【推荐1】函数
的单调递增区间( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7129598324956757571c97f20e241d21.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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适中
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【推荐2】给出下列四个命题:
(1)若
为假命题,则
、
均为假命题;
(2)命题“
”为真命题的一个充分不必要条件可以是
;
(3)已知函数
则
;
(4)若函数
的定义域为R,则实数
的取值范围是
.
其中真命题的个数是( )
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(2)命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6944539e22a089a80168e2878c9ecc52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ede78fd7ac619ea597856254bb5d75.png)
(3)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589883a5d97f0f7ee75dd0c97e9406bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289688ca788f9edb554836fd083313f2.png)
(4)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6810e2bb8de3e83fd73a4f5690de07b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/389d79319d0694c3d75bbaf19d0a8581.png)
其中真命题的个数是( )
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
单选题
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适中
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【推荐1】已知集合
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbd1bbdf13cac0acd882e8f40e42652c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a338af06b5033e9d2e40d44f1b9a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fe156c10c39e5214f325ce8a2180858.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
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适中
(0.65)
解题方法
【推荐2】已知函数
,则函数
的定义域为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ce73b6f0e41a09683639ed9470a1422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次