名校
解题方法
1 . 下列说法错误的是( )
A.命题“![]() ![]() |
B.若![]() ![]() ![]() |
C.当![]() ![]() |
D.命题“![]() ![]() |
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2 . 命题
:直线
与圆
有公共点,命题
:双曲线
的离心率
.
(1)若
均为真命题,求实数
的取值范围;
(2)若
一真一假,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f257b2c95f1935920f05d159b08a9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8785046420bdd426bbd7a26041ff214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc3de2a92f1ce64ad41243f39fbc4756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4612a3d0ca32bdc27e1656f9c55ee7b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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3 . 已知两个命题:(1)若
,则
;(2)若四边形为等腰梯形,则这个四边形的对角线相等.则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75079a6b4a111588c52ef67b227d47f.png)
A.命题(2)是全称量词命题 |
B.命题(1)的否定为:存在![]() |
C.命题(2)的否定是:存在四边形不是等腰梯形,这个四边形的对角线不相等 |
D.命题(1)和(2)被否定后,都是真命题 |
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解题方法
4 . 下列命题为真命题的是( )
A.若![]() ![]() |
B.![]() |
C.若![]() ![]() ![]() |
D.存在![]() ![]() |
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5 . 已知函数
.
(1)证明:函数
有且只有两个不同的零点;
(2)已知
,设函数
的两个零点为
,试判断下列四个命题的真假,并说明理由:
①
;②
;③
;④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edca4db207f4b253d6e9c780e557642f.png)
(1)证明:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf910f82c3094b267a3d481d23d829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3b114eb69ad77a0495468af7bb41b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/885c20eafab97db145af40138279adbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e2095119185f0410bb10cae34f14243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4a11440f9199546f719432280176f2.png)
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名校
6 . 下列命题的否定中,是全称量词命题且为真命题的有( )
A.![]() | B.所有的正方形都是矩形 |
C.![]() | D.至少有一个实数![]() ![]() |
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7 . 德国数学家狄利克雷在数学领域成就显著,以其命名函数
,该函数被称为狄利克雷函数,关于狄利克雷函数有如下四个命题:
①
;②对任意
,恒有
成立;
③任取一个不为零的有理数
,
对任意实数
均成立;
④存在三个点
、
、
,使得
为等边三角形;
其中真命题的序号为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45f43182131a34b3e094678aac2e419.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a336131c014bbc0e8335a0563cb9a3d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9322dd8f56b5f8d2c667fdf0d4a9f9aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433f6b9b7fac3b81c8ed21130acd2b27.png)
③任取一个不为零的有理数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d4733dc784c0deec396b4d7ec32316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
④存在三个点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741779d13c0e882dfdd90561450883ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82170a0e0e186bfe372be1ffc74af69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3b7ee8239d9dacff0227ed38e8d61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
其中真命题的序号为( )
A.①②③④ | B.②④ | C.②③④ | D.①②③ |
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2024-01-23更新
|
246次组卷
|
2卷引用:上海市长宁区复旦中学2023-2024学年高一上学期12月月考数学试题
8 . 已知定义在
上的函数
,对于给定集合A,若对任意
,当
时都有
,则称
是“A封闭”函数.已知给定两个命题:
:若
是“
封闭”函数,则
是“
封闭”函数.
:若
是“
封闭”函数
,则
在区间
上严格减.
则下列正确的判断为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac87434324956e4145e38ad92a1aa95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3c61fff37bcaf1568b2e88226a74f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e4f57099600b733e9db7ecaf8b877b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1a83e32683c673dce84a19c0ea3a30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd164e70ba920213ca59adc1991f7a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4147f6b55ff0b669726470b57ef1fe96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca6d68f1de3e70696f1d5d60affe6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc3cf2bbc40ce8cae3f98340af190dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca6d68f1de3e70696f1d5d60affe6ef.png)
则下列正确的判断为( )
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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9 . 设
,用
表示不超过
的最大整数,则
称为“取整函数”,如:
,
.现有关于“取整函数”的两个命题:①集合
是单元素集:②对于任意
,
成立,则以下说法正确的是 ( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7179c645736d68c90023f83d7f11ed01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc995d4dc915fce7b9aa2a580a250d1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c61163f4e1b32c17ce802243394a3084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29b281235fa7f32c4cb22e9689f29ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb63478132d4c1fef3c17e591919da83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95add24865272c29a7131e8635e2775.png)
A.①②都是真命题 | B.①是真命题②是假命题 |
C.①是假命题②是真命题 | D.①②都是假命题 |
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2024·全国·模拟预测
解题方法
10 . 关于函数
,有下列四个命题.甲:
;乙:
;丙:
在
上单调递增;丁:对任意
,总有
.其中恰有一个是假命题,则该命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a1b51fc74390c262bc0bcaeb20369c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c05a467ddaa138590b3b56615c2c42a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d47dbed3333b180fce58a6d9e440f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d7f5befcb4df3784f7d5166fe288c00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7497de111a901e3a2cd2bbaf0abaf60.png)
A.甲 | B.乙 | C.丙 | D.丁 |
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