名校
1 . 用适当的符号(⊆,⊇,∈,∉)填空:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10961ddd7001e0c3eb613286c6e6df8d.png)
________
;
(2)2________
;
(3)N*________ N;
(4)R________ Q.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10961ddd7001e0c3eb613286c6e6df8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5807c2884dffa6b4f990fbaa4c5e992.png)
(2)2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/133aed298ea76c077fbe9e153ea44750.png)
(3)N*
(4)R
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2 . 下列有关命题的说法正确的是( )
A.若集合![]() ![]() |
B.![]() ![]() |
C.若![]() ![]() ![]() |
D.函数![]() ![]() |
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解题方法
3 . 下面命题正确的有( )
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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4 . 下列说法正确的有( )
A.集合![]() ![]() ![]() |
B.设集合![]() ![]() |
C.已知![]() ![]() ![]() |
D.已知![]() ![]() |
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5 . 下列命题中,假命题的是( )
A.已知集合![]() ![]() ![]() ![]() |
B.若函数![]() ![]() ![]() |
C.已知函数![]() ![]() ![]() |
D.若![]() ![]() |
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6 . 下列五个命题
①在某项测量中,测量结果
服从正态分布
,若
在(0,2)内取值的概率为0.4,则
在(0,+∞)内取值的概率为0.8;
②集合
,
,则
的真子集个数为3;
③命题“若
,则
”的逆否命题为“若
,则
”;
④若
的展开式中各项的二项式系数之和为
,则此展开式中
项的系数为
;
⑤在
道题中有
道理科题和
道文科题,如果不放回地依次抽取
道题,在第1次抽到理科题的条件下,第2次抽到理科题的概率为
.
其中正确的个数为( )
①在某项测量中,测量结果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ebc80e6cdaa4ccef8de10f6845223f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
②集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d304ab6ef3bdca676cb43c6d63e3de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c57f7aa48188d5ab9f14bf327bb3deb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
③命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b0b55c3297ce66c96d1559d76971f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb0469b312798e19c24fe494d03fb0a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727bd2eb1d561e821c4d175f15cf705e.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47b12af9f76f37024f3756e644de0315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814397354c2ae1cb08e0271305970811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f959e5f8d89390f0f136f6acc9f6fb.png)
⑤在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
其中正确的个数为( )
A.2 | B.3 | C.4 | D.5 |
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