1 . 下列判断中,正确的是( )
A.“若![]() ![]() |
B.“![]() ![]() ![]() |
C.命题“![]() ![]() |
D.当![]() ![]() |
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2 . 已知命题
关于
的不等式
对一切
恒成立,命题
对
恒成立,若
或
为真,
且
为假,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4510aefa5be5ab1e8990a696fbe04400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2121786865bc89975c9a2b59520a038a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.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/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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3 . 已知命题p:“若
,则
且
”.则命题p,命题p的逆命题、否命题.逆否命题,这4个命题中真命题的个数为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65e678db71585b1ebec7c53cb22080e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50866229ec5a3640fb250f9bd2192b3.png)
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2020-04-30更新
|
142次组卷
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2卷引用:安徽省滁州市定远县第二中学2018-2019学年高二上学期第二次调研考试数学(文)试题
名校
4 . 已知
,
;
,
.若
为真而
为假,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c204575d0bb275b4774794fa79b99c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad8de3460ce54eb7d478fb012c73b2b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9395bb671c68b418ec6931cfc8366e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c276cd0442090049ddc455a778c3753.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/0a6936d370d6a238a608ca56f87198de.png)
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2020-04-28更新
|
261次组卷
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10卷引用:安徽省芜湖市第一中学2020-2021学年高一上学期期中数学试题
安徽省芜湖市第一中学2020-2021学年高一上学期期中数学试题2016-2017学年黑吉两省八校高二上期中数学(理)试卷2016-2017学年黑吉两省八校高二上期中数学(文)试卷湖北省咸宁市五校2016-2017学年高二3月联考数学(理)试题【全国市级联考】福建省长乐高级中学2017-2018学年高二下学期期末考试数学(文)试题(已下线)活页作业6-2018年数学同步优化指导(北师大版选修1-1)人教版 全能练习 选修1-1 第一章 常用逻辑用语 全称量词与存在量词湖北省鄂东南省级示范高中教育教学改革联盟学校2018-2019学年高二下学期期中联考数学(文)试题湖北省武汉市第十四中学2021-2022学年高一上学期10月月考数学试题吉林省白城市洮南市第一中学2021-2022学年高一上学期期中考试数学试题
名校
5 . 已知命题p:若
且
,则
,则命题p的逆否命题及其真假分别为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b21208364124b5c477b2ff8df1c2e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c15d289a1d5ae856d3498a9b4bfedc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9172aed9258bbdbb0ba93ca13e3bc15.png)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() |
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2020-04-24更新
|
159次组卷
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2卷引用:安徽省池州市2019-2020学年高二上学期期末理科数学试题
6 . 设
为实数,
,
,不等式
恒成立.
(1)若
为真命题,求实数
的取值范围;
(2)若
为真命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c44eb7d072bdf455cffa58e6288f03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cab2f87002ca6e08cd56ccd7fee140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dcc7158376726821233f29077555a3e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39967dc97238fb3a21f182014fc89214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2020-04-20更新
|
166次组卷
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3卷引用:天一大联考皖豫联盟体2019-2020学年高三第一次考试文科数学试题
天一大联考皖豫联盟体2019-2020学年高三第一次考试文科数学试题2020届天一大联考皖豫联盟体高中毕业班第一次考试理科数学(已下线)第02讲 常用逻辑用语-2021年新高考数学一轮专题复习(新高考专版)
名校
7 . 下列命题正确的是( )
A.若![]() ![]() |
B.![]() ![]() |
C.命题“若![]() ![]() |
D.命题“![]() ![]() |
您最近一年使用:0次
名校
8 . 下列命题中正确命题的个数是( )
①对于命题
,使得
,则
,均有
;
②命题“已知x,
,若
,则
或
”是真命题;
③设
,
是非零向量,则“
”是“
”的必要不充分条件;
④
是直线
与直线
互相垂直的充要条件.
①对于命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fac11dd95cb4b78adb817fad02dedb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264dab145ceba44696a6ee63b1e1549d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84aa95f148161958d495918558233b46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547adc121c442b3bb9189e6df5ee4018.png)
②命题“已知x,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54dad48527a47eab4a5916ab0421cc71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34982de5d3f287cd570ea30eb46d185.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d09b9fc9719ff6faf32254b9d48713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be861d83cddb5fc8aa22f7f0f9415d6.png)
③设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10cc91793018e8fd26a5563241b7fbcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf6e44ef422547c003e0a6377bbf918.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a3cc8c48bf54ec8252e5dce6867754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7bbd8e6d45fe24f59cb44dc54a021f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54adc7d893cab06017029dfc58d7a093.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
名校
9 . 已知命题
,使
成立,命题
恒成立.
(1)若命题
为真,求实数a的取值范围;
(2)若p或q为真,p且q为假,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fac11dd95cb4b78adb817fad02dedb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8062caf32b7a809cbdc3c9af370462dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c8204ec3fd3cb060f3acea96824ec3.png)
(1)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
(2)若p或q为真,p且q为假,求实数a的取值范围.
您最近一年使用:0次
2020-02-27更新
|
819次组卷
|
6卷引用:安徽省合肥市一六八中学2019-2020学年高二上学期期末数学(文)试题
安徽省合肥市一六八中学2019-2020学年高二上学期期末数学(文)试题安徽省合肥一六八中学2019-2020学年高二上学期期末考试数学(理)试题(已下线)1.1+命题及其关系(重点练)-2020-2021学年高二数学(文)十分钟同步课堂专练(人教A版选修1-1)(已下线)1.1+命题及其关系(重点练)-2020-2021学年高二数学(理)十分钟同步课堂专练(人教A版选修2-1)四川省成都七中2020-2021学年度高二上期10月阶段性考试理科数学试题四川省成都七中2020-2021学年度高二上学期10月阶段性考试文科数学试题
名校
10 . 下列命题为真命题的序号是__________ .
①“若
则
”是真命题.
②“若
则
”的逆命题是真命题.
③
,“
”是“
”的充分不必要条件.
④“
”是“直线
与直线
互相垂直”的充要条件.
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde329f95b569c8259f8f5f510baaa32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4396ab83803cb86dceb4f0dd72f05111.png)
②“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8546df880be5835acc3f22edbbf8fe7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200b80b0f9dd6c732ebb22188eceac5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ae71b387214c853f22960ed366d16b8.png)
④“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289ce704ab8d876aa9756cf3ae972a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f11c10707e8bdb96b44ec0bb5644eb32.png)
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