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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 . 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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3 . 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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4 . 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
|
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
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5 . 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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解题方法
6 . 下列四个命题中为真命题的是( )
A.若![]() ![]() |
B.若命题![]() ![]() |
C.设![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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7 . 下列命题正确的是______
①若给定命题p:
,使得
,则
:
,均有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe46868049380b61fd061698ad59dbb.png)
②若
为假命题,则p,q均为假命题
③“
”是“
”的必要不充分条件
④命题“若
,则
”的否命题为“若
,则
”
①若给定命题p:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8645952ea14b25443f411d39bdec641e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea8c817d58f773e1ab3b1f71165fd1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe46868049380b61fd061698ad59dbb.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d141f34f18f4802d04ef2e4e5e803aba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ccaa6e503b61e9ae78d8439cba2e328.png)
④命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fdf7d28b97fb6fe731703f80e122ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fdf7d28b97fb6fe731703f80e122ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d09b9fc9719ff6faf32254b9d48713.png)
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8 . 命题“已知
,若
,则
”的否命题是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a27ccd05082515be5e69dd47b874dac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3002ad1638f25e355d70d5ab63e637f4.png)
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9 . 命题“已知
,若
,则
”的否命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a27ccd05082515be5e69dd47b874dac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3002ad1638f25e355d70d5ab63e637f4.png)
A.已知![]() ![]() ![]() | B.已知![]() ![]() ![]() |
C.已知![]() ![]() ![]() | D.已知![]() ![]() ![]() |
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10 . 下列命题中正确的是( )
A.若命题p为真命题,命题q为假命题,则命题“![]() |
B.命题“若![]() ![]() ![]() ![]() |
C.“![]() ![]() |
D.命题“若![]() ![]() ![]() ![]() |
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2022-10-28更新
|
369次组卷
|
3卷引用:新疆生产建设兵团第二师华山中学2023届高三上学期(提高、实验段)第三次月考数学(理)试题