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1 . 下列有关命题的说法正确的是( )
A.命题“若![]() ![]() ![]() ![]() |
B.“![]() ![]() |
C.若![]() ![]() |
D.命题“若![]() ![]() |
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2 . 下列说法中,正确的是( )
A.命题“若![]() ![]() ![]() |
B.命题“若![]() ![]() ![]() ![]() |
C.命题“若![]() ![]() ![]() ![]() ![]() |
D.若命题p:![]() ![]() ![]() |
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3 . 命题“若
,则
或
”的否命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25339da44bf61bf1c130f5f23e565018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bc1807f5f5784e75c4e5e6df17f3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c2c4b82d87e769807270fc5361fde3.png)
A.若![]() ![]() ![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() | D.若![]() ![]() ![]() |
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2024-01-05更新
|
228次组卷
|
2卷引用:宁夏石嘴山市第三中学2016-2017学年高二上学期第二次月考数学(理)试题
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4 . 设
,
,若
是
的必要不充分条件,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a13d9a2ea1779b61df0bb20db8a0bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f859e866576f64c558bac1dbb92731f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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5 . 给出下列四个结论:
①命题“
”的否定是“
”;
②“若
,则
”的否命题是“若
,则
”;
③若
则
恒成立
④若
,则
是
的充分不必要条件.
其中正确结论的个数为( )
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8a044b53c69493ef3e576b3f2020eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eff6f545ca2940c9c47c7310b3515d59.png)
②“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e186ebc624ebacde9a03b96289f1ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c142fcbe914e5a8382e866678f325ee3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e27d0815b42bbb53f3d9d1120bf588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0786f79b5cf28c9fc2a517ce6fd80b6e.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b366bd12b731cfa3dda3a8b86d10f194.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20357ca15141f2c003aca449f321c182.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69af352c597c568e02eb9e8a0b939a4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
其中正确结论的个数为( )
A.1 | B.2 | C.3 | D.4 |
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6 . 有下列四个命题:
①“若
,则
互为倒数”的逆命题;
②“面积相等的三角形全等”的否命题;
③“若
,则
有实数解”的逆否命题;
④“若
,则
”的逆否命题.
其中真命题为( )
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377a2333ff8c63cbdb20b882d6d5a7ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7822f361618da0965955d7bc25c4b49c.png)
②“面积相等的三角形全等”的否命题;
③“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347c62b44fae618a37c145b3b5d1f1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5707186257494f1fea86066f2778b5.png)
④“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b05d2be27e8f53e4de3071846dffb41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.png)
其中真命题为( )
A.①② | B.②③ | C.①②③ | D.①②③④ |
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7 . 下列命题不正确的是( )
A.“![]() ![]() |
B.若![]() ![]() ![]() |
C.命题“若![]() ![]() |
D.命题“若![]() ![]() ![]() ![]() |
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2023-10-26更新
|
161次组卷
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2卷引用:四川省内江市威远中学校2024届高三上学期第三次月考数学(理)试题
8 . 已知
.
(1)若
是
的必要不充分条件,求实数
的范围;
(2)若
是
的必要不充分条件,求实数
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb67b053a005ace5be3e60dca09813d.png)
(1)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/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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9 . 下列四个命题中为真命题的是( )
A.若![]() ![]() |
B.若命题![]() ![]() |
C.![]() ![]() |
D.命题“若![]() ![]() ![]() ![]() |
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10 . “若
,则
”的否定形式为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57032c1466f18d9750637c3a00f6a316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a12a30935c79ae769818043a496f53.png)
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