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1 . 下面有四个命题:
①“
,
”的否定是“
,
”;
②命题“若
,则
”的否命题是“若
,则
;
③“
”是“
”的必要不充分条件:
④若命题
为真命题,
为假命题,则
为真命题.
其中所有正确命题的编号是
①“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dd2dea76acbb2d3fd7b0239f1b2dd33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02491f9709f00a1bc169278fbe01f576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6322cddc0e00dd1ae0024b5b586402c4.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734a6a1d319648bb969845a9159cdba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852a76da9449e2e3e5dfed08922f11c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734a6a1d319648bb969845a9159cdba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a05f81f941fff0fbe2f211e0668c929.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8adaa3d42ccb9d59e0d6b6f60bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fb3b5ba4ccb34e597f67d9015aa77c9.png)
④若命题
![](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/f675824e539f50cec53120959d32e554.png)
其中所有正确命题的编号是
A.①②④ | B.①③ | C.①④ | D.②④ |
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2 . 以下三个命题正确的个数有个.①若
,则
或
;②定义域为
的函数
,函数
为奇函数是
的充分不必要条件;③若
,
且
,则
的最小值为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3755d7e08b98c26303f2f61de7e7ddd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9eb15eae84a4d83e9af1deac77abf6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c925c4283740ce6cc412c1c5f57b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01bea8bf593f594c51fc7cc547482bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adf913c92060a7bad4de1ee8c04d011e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f0b84ee4ed90face0993d4f4dda379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3755d7e08b98c26303f2f61de7e7ddd2.png)
A.0个 | B.1个 | C.2个 | D.3个 |
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3 . 下列命题中为真命题的是( )
A.![]() |
B.“![]() ![]() |
C.已知p,q为两个命题,若“![]() ![]() |
D.命题“若![]() ![]() ![]() ![]() |
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4 . 已知命题
:在
中,若
,则
;命题
:向量
与向量
相等的充要条件是
且
.在下列四个命题中,是真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b610c855735a35d4168ac6a0f72ef904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab14f1db85f43583c37c416c1bcacd67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460e5ba67828c57daf2edb497fb52e56.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 给定下列两种说法:①已知
,命题“若
,则
”的否命题是“若
,则
”,②“
,使
”的否定是“
,使
”,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c0e9d1ad9561d693958756ee8398218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a57e060f61f7efa54982bda67db483a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f9a67d0c6387f646e9041cc37ef63d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb1e6ee974755d089ddfa842fb4d4b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84af94191072d9fed1e0576ca0b8e5b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c7a319f1fb9ef4cd6bd9eb5ab0c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2367b48e8f6dbbfe3dd14f6eab8238a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6acb0f1ac694dd177e99fc385f23318.png)
A.①正确②错误 | B.①错误②正确 | C.①和②都错误 | D.①和②都正确 |
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四川省叙永第一中学校2024届高三上学期一诊数学(理科)试题河南省天一大联考2018-2019学年下学期高二年级期末测试理科数学试题河南省天一大联考2018-2019学年下学期高二年级期末测试文科数学试题河南省林州市第一中学2019-2020学年高二6月月考数学(文)试题河南省林州市第一中学2019-2020学年高二6月月考数学(理)试题(已下线)专题07+1.5.1+全称量词与存在量词(基础练)-2020-2021学年高一数学十分钟同步课堂专练(人教A版2019必修第一册)
6 . 下列语句不是命题的有( )
①若
,
,则
;②
;③
;④函数
(
,且
)在
上是增函数.
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46196aec06c25d5c8f9b1d3a8f50a889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069390dd908ff203327958117a226593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0aa2ef928b6e3341d0a0dc6d8055b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e840fbe63d521744ffabaa7645c21fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da53929a8f67b9aa3827fdbd73ebd265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
A.0个 | B.1个 | C.2个 | D.3个 |
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真题
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7 . 有四个关于三角函数的命题:
:
x
R, ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db93f5ae179d970e478cb43b8030291c.png)
+![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baac50f844ebc073cbd706eac150c4e6.png)
=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
:
x、y
R, sin(x-y)=sinx-siny
:
x![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
,
=sinx
: sinx=cosy
x+y=![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
其中假命题的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be646cd52d7f2f1714e7542e75810f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408c3726fe0b0698826dc623f269e179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db93f5ae179d970e478cb43b8030291c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1020afcfd8b7de38dfd825373b86bdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baac50f844ebc073cbd706eac150c4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1020afcfd8b7de38dfd825373b86bdea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adad9633b73dfbbb3d84b4f15979e99e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408c3726fe0b0698826dc623f269e179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87b21b872313f7d8c5b606981f954a1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49dac463bbb7375dbf8e2246f9a6f0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02d44492b51b0e08208fdc0d1707025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53496ae2397150370142b5195a1a39c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce56299c259c2bf0fb56c16bfbb81e22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc119550ce4fc5f3d1daf996e7243bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ef73aff3fe470e367f4af24fdfff3df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
其中假命题的是
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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四川省南充市嘉陵一中2018届高三上学期期中考试理数学试题2009年普通高等学校招生全国统一考试理科数学(宁夏卷)2009年普通高等学校招生全国统一考试文科数学(宁夏卷)(已下线)2012届浙江省台州市台州中学高三上学期第三次统练理科数学吉林省普通中学2018届高三第二次调研测试数学理试题【全国百强校】贵州省遵义航天高级中学2018届高三上学期第四次模拟考试数学(理)试题2020届河南省平顶山许昌济源高三第一次质量检测数学(文)试题湖北省黄冈联考协作体2018-2019学年高三上学期期中理科数学试题北京市第十四中学2022届高三上学期期中考试数学试题(已下线)专题02 逻辑用语与命题100题-【千题百练】2022年新高考数学高频考点+题型专项千题百练(新高考适用)山东省泰安市2023-2024学年高三上学期11月期中考试数学试题吉林省长春市十一高中2021-2022学年高一上学期期末数学试题
8 . 已知命题
的充要条件是
且
;命题q:若
,
是两个非零向量,“
”是“
”的充要条件,则下列命题为真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3ef96406382e1284c323a11fd81efc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c05f1d68b133c5d2f76a06186e0ffb08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/444ba76b06bbd289344a64eb32212bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/480e7839b807ca5c0c6c4028eba6c00c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5aa846a5b7c96fe2ce665eb1ea5f0e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
9 . 关于数列
,给出下列命题:
①数列
满足
,则数列
为公比为2的等比数列;
②“a,b的等比中项为G”是“
”的充分不必要条件;
③数列
是公比为q的等比数列,则其前n项和
;
④设
是公比为q的等比数列,则“
”是“
为递增数列”的充分不必要条件.
其中假命题的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
①数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3387981a4838904d5aba7b4cc5e81168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
②“a,b的等比中项为G”是“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c8379fe535e68721fd84be969d257f.png)
③数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78edc28c97bec6127eecb31d6ea4c95.png)
④设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda6dc559d07bc22c9a0ed1e3a6d01d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
其中假命题的序号是( )
A.② | B.②④ | C.①②④ | D.①③④ |
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10 . 命题“若
,则
”的逆否命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba53065eb180a682305fddb95d14b62f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45f3e82b25339b98d64f6c52084c530.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
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