名校
1 . 下列命题:
①若
,则
;
②“在
中,若
,则
”的逆命题是真命题;
③命题“
,
”的否定是“
,
”;
④“若
,则
”的否命题为“若
,则
”.
则其中正确的是______ .
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f7c54faca6eac8af5309942062058d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2128a00f52af4427721f0ebba591daa.png)
②“在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
③命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1485a4756c56f1126b9825d5019d544c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3aaa2a2d80fae904461d89ca8fa1f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fc6252b12df14414d6ebfe03749b4b5.png)
④“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdbb2015f2be55935cb9e48d967190df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3798d6c2e5eac9c1d8b044efd5081acf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd489150af4efdecc3489b7af74ce3d3.png)
则其中正确的是
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2 . 下列五个命题:
①命题“若
,则
”的否命题是“若
,则
”;
②若命题
,则
;
③若命题“
”与命题“
或
”都是真命题,则命题
一定是真命题;
④命题“若
,则
”是真命题.
⑤命题“集合
有2个子集”是假命题.
其中正确命题的序号是___________ .(把所有正确的命题序号都填上)
①命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3019b662e5dc2750bb6f9199d3250f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae9ba258299eb489b490594397e23c.png)
②若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb646dfa8363743b0f88cf42582f184a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cda5230d99304c2ea7055d1fec725a7.png)
③若命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](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/9aa8a716a31b0f51b70fdf9bdb257909.png)
④命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a17252a7d726172192959c61e97a6251.png)
⑤命题“集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60c18cee0e8d3411288b2a24ce1d4c0c.png)
其中正确命题的序号是
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河南省南阳市第一中学校2021-2022学年高三上学期第二次月考数学(文)试题河南省焦作市温县第一高级中学2021-2022学年高三上学期9月月考数学(文)试题(已下线)热点02 集合与常用逻辑用语-2022年高考数学【热点·重点·难点】专练(新高考专用)(已下线)押全国卷(理科)第3,14题 常用逻辑用语与平面向量-备战2022年高考数学(理)临考题号押题(全国卷)
3 . 设a、
,原命题“若
,则
”,则原命题、逆命题、否命题、逆否命题这四个命题中正确的个数是___________ 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d285a4c557fc9748105b62ccd94b7859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3772ba1f9e13dff013caac4588672f50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e386beb267e2e88f234d017f239020.png)
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10-11高二下·湖北襄阳·期中
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4 . 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________ (填写所有真命题的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377a2333ff8c63cbdb20b882d6d5a7ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347c62b44fae618a37c145b3b5d1f1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5707186257494f1fea86066f2778b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b05d2be27e8f53e4de3071846dffb41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.png)
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12卷引用:2011-2012学年河南省平顶山市高二下 期末调研考试理科数学试卷
(已下线)2011-2012学年河南省平顶山市高二下 期末调研考试理科数学试卷(已下线)2010-2011年湖北省襄阳四校高二第二学期期中考试文数(已下线)2011-2012学年黑龙江省哈师大附中高二上学期期中文科数学试卷(已下线)2011-2012学年安徽省太湖中学高二下学期期中文科数学试卷(已下线)2012-2013学年湖南省浏阳一中高二下学期第一次月考文科数学试卷2015-2016学年江苏省沭阳县高二上学期期中考试数学试卷2015-2016学年河北省秦皇岛市卢龙县高二上学期期末理科数学试卷沪教版 高一年级第一学期 领航者 第一章 1.7 复习与小结(2)江西省赣州市寻乌中学2019-2020学年高二上学期第二次段考数学(文)试卷上海市上海外国语大学附属外国语学校2017-2018学年高一上学期10月月考数学试题上海市上海外国语大学附属外国语学校2015-2016学年高一上学期期中数学试题(已下线)专题03+常用逻辑用语(1)(命题,充分条件与必要条件)-2020-2021学年新教材高一数学秋季辅导讲义(沪教版2020)
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5 . ①“若
,则
”的逆命题是假命题;
②“在
中,
是
的充要条件”是真命题;
③“
是函数
为奇函数的充要条件”是假命题;
④函数
在区间
有零点,在区间
无零点.
以上说法正确的是_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ab5174edcf796e06fc85e28614432f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd62f741b8897536cf616b5774247f6a.png)
②“在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2905b41405398718abd03d8894cf81a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa3638653a94a02420f176d860e294e.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0f62fd8b5d0665fd70c4a5843109ebd.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58f24d2421c8c7459bb00b2e2734ca99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77dc0ed4cbf8211aacacb7362c83ca95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93c13c9d1a1f85ab7a9b044c669bf53.png)
以上说法正确的是
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|
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名校
6 . 有下列四种说法:
①
,
均成立;
②若
是假命题,则
都是假命题;
③命题“若
,则
”的逆否命题是真命题;
④“
”是“直线
与直线
互相垂直”的充要条件
其中正确的命题有__________ .
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9ef006e1364f2e480c8d1c70ed05077.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
③命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13abf1d7298444627d32294dca2f005b.png)
④“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff9cf3df50b5b1396fca74424289831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289ce704ab8d876aa9756cf3ae972a2e.png)
其中正确的命题有
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11-12高三上·河南三门峡·期末
7 . 给出下列四个结论:①“若
,则
”的逆命题为真; ②若
为
的极值,则
; ③函数
有3个零点;④对于任意实数
,有
且
时,
,
,则
时,
.其中正确结论的序号是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91bcddc2ece6bcde9355e222e1cf9f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7417645b760b0e03cfe0bcdaa6a1d93e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1260c6fa15a4d739a41c5de1533e9e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59cce6694373c6d0505258665528abee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57898c02b34491684e0d2679df8ccb5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca54c030a524028f5d8a2074d5b4dea9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a3a0ca3089bc43ec4399457278f449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0a5d10fecd4b5a0c2c2a77b5ce72e6.png)
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解题方法
8 . 下列正确结论的序号是____ .
①命题“
,
”的否定是“
,
”;
②命题“若
,则
或
”的否命题是“若
,则
且
”;
③已知线性回归方程是
,则当自变量的值为
时,因变量的精确值为
;
④若
、
,则不等式
成立的概率是
.
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547adc121c442b3bb9189e6df5ee4018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264dab145ceba44696a6ee63b1e1549d.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3019b662e5dc2750bb6f9199d3250f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/143b917df0520097be222accbddf9394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae9ba258299eb489b490594397e23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03b011f69dfc5262a3d82f64676739b.png)
③已知线性回归方程是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55951dbe26ab9140568011e6331a4de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48bda099d4ccbffd59338c873b0193e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ec85a906d76e8f903bc0bec40abb58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
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