名校
解题方法
1 . 对下列命题:
(1)若命题
,则命题![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aed598e8d3f64d994c6be400a01f8e29.png)
(2)
的最小值为4;
(3)
是各项均为正数的等比数列,则
是等差数列;
(4)
,且
是锐角,则实数的取值范围为
;
其中所有正确命题的序号为___________ (填出所有正确命题的序号).
(1)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97848955a36d41def3a1c31115cb93a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aed598e8d3f64d994c6be400a01f8e29.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92764eb4fd255796e92c2c4db5909efc.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc71a2fd8c6b263feea5ff5d6a36121.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b5d531efd6be7ffc145c9c6597afab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfaf8279481e31e730f866dd047f9224.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a891eb0f07654c6dda4380b2fae38e8a.png)
其中所有正确命题的序号为
您最近一年使用:0次
名校
2 . 以下命题:
①“
”是“
”的充分不必要条件;
②命题“若
,则
”的逆否命题为“若
,则
”;
③对于命题
:
,使得
,则
:
,均有
;
④若 “
为假命题,则
,
均为假命题;
其中正确命题的序号为_______________ (把所有正确命题的序号都填上).
①“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679353e656a54993c041ebd39ec7b31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5c2d94fe3cf596668296a6a47f6acb.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5c2d94fe3cf596668296a6a47f6acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679353e656a54993c041ebd39ec7b31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bd10e37c3171c448ec8398703da1402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9dbae6a5be3e8b9eb0534b6dfe8d9.png)
③对于命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bded4e08a5c75fd82f1868c9f4c5b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c573668c3e115816057a91b18130fd12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30fd5acd3cea0866f64bc80ab4c14e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbdf492b48e5da4602f2bde199deae4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380b00e1533db2f67c6114c750e54269.png)
④若 “
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e58c01f501f63c4ceb6cc7bee677aa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
其中正确命题的序号为
您最近一年使用:0次
名校
3 . 下列共用四个命题.
(1)命题“
,
”的否定是“
,
”;
(2)在回归分析中,相关指数
为
的模型比
为
的模型拟合效果好;
(3)
,
,
,则
是
的充分不必要条件;
(4)已知幂函数
为偶函数,则
.
其中正确的序号为_________ .(写出所有正确命题的序号)
(1)命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c7a319f1fb9ef4cd6bd9eb5ab0c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03edd85c55c93a3e34d3477d7e04f731.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aec0693231f71fc10f820c41823dd37.png)
(2)在回归分析中,相关指数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c85067c53e936ef32da818efe04bdbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be68b3aa1b5022969487c0bb8aad2c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c85067c53e936ef32da818efe04bdbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/085ce2eeb0eb35af515d1ecd8ebaa610.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd15a98f5f7c568023a3db60c2e1de2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0029379a0e2f8595cfb343a5c03f99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(4)已知幂函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eb7ed9690c65a9fbfe0441af5f0b26e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba24ca9648a13438daa6da7a10073163.png)
其中正确的序号为
您最近一年使用:0次
2017-05-26更新
|
851次组卷
|
4卷引用:湖南省长沙市长郡中学2017届高三5月模拟考试数学(理)试题
4 . 给出下列命题:
①命题“同位角相等,两直线平行”的否命题为:“同位角不相等,两直线不平行”.
②“
”是“
”的必要不充分条件.
③“
或
是假命题”是“
为真命题”的充分不必要条件.
④对于命题
:
使得
,则
:
均有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491ef2ec844032e0c2ab9cc4a545dff3.png)
其中真命题的序号为________ (把所有正确命题的序号都填在横线上)
①命题“同位角相等,两直线平行”的否命题为:“同位角不相等,两直线不平行”.
②“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e30c903d8f8a05332af0b19e7e40df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727bd2eb1d561e821c4d175f15cf705e.png)
③“
![](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/7ffc1bb9d53a27d484396ad74d6a26e0.png)
④对于命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455f2c260624da19c2b044f1e80006b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6854e4631eb5f02d9f60732d80ad7117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21f00047ebe6f01a61e53c08192b8df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491ef2ec844032e0c2ab9cc4a545dff3.png)
其中真命题的序号为
您最近一年使用:0次
5 . 给出以下四个命题:
①已知命题
;命题
.则命题
和
都是真命题;
②过点
且在
轴和
轴上的截距相等的直线方程是
;
③函数
在定义域内有且只有一个零点;
④先将函数
的图象向右平移
个单位,再将新函数的周期扩大为原来的两倍,则所得图象的函数解析式为
.
其中正确命题的序号为_______________ .(把你认为正确的命题序号都填上)
①已知命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134bea5721c0cf6e8e714f1ffcfb03e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d88d01fd93d799628ccc01cdcee0162d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
②过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27cf818dd484cc4cebd40a5f28eb8e9f.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/0985b973395bcd371cd1e26d3fcd1c36.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4be5a03c3cf1c9373082a3fe64480443.png)
④先将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780209d8e2b9ce902d8b483cd674f9c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
其中正确命题的序号为
您最近一年使用:0次
2016-12-03更新
|
1190次组卷
|
2卷引用:2014-2015学年江苏教育学院附属高中高三上学期期中理科数学试卷
12-13高二上·甘肃武威·阶段练习
6 . 已知命题p:存在x∈R,使tan x=1,命题q:x2-3x+2<0的解集是{x|1<x<2},现有以下结论:
①命题“p且q”是真命题;②命题“p且¬q”是假命题;③命题“¬p或q”是真命题;④命题“¬p或¬q”是假命题.
其中正确结论的序号为________ .(写出所有正确结论的序号)
①命题“p且q”是真命题;②命题“p且¬q”是假命题;③命题“¬p或q”是真命题;④命题“¬p或¬q”是假命题.
其中正确结论的序号为
您最近一年使用:0次
2016-12-03更新
|
1351次组卷
|
8卷引用:2012-2013学年甘肃武威六中高二12月学段检测理科数学试卷
(已下线)2012-2013学年甘肃武威六中高二12月学段检测理科数学试卷(已下线)2015高考数学一轮配套特训:1-3简单的逻辑联结词全称量词与存在量词(已下线)2019高考备考一轮复习精品资料 【文】专题三 简单的逻辑联结词 押题专练(已下线)章末质量检测1 常用逻辑用语-2018年数学同步优化指导(北师大版选修2-1)(已下线)2019高考热点题型和提分秘籍 【理数】专题3 逻辑联结词、全称量词与存在量词 (题型专练)(已下线)2019高考热点题型和提分秘籍 【文数】专题3 逻辑联结词、全称量词与存在量词( 题型专练)(已下线)专题1.3 简单的逻辑联结词、全称量词与存在量词(精测)-2021届高考数学(理)一轮复习讲练测河南省兰考县第二高级中学2021-2022学年高二上学期第三次考试数学试题
20-21高二·江苏·单元测试
解题方法
7 . 以下几种说法
①命题“∃a>0,使函数f(x)=ax2+2x﹣1只有一个零点”为真命题
②命题“已知x,y∈R,若x+y≠3,则x≠2或y≠1”是真命题
③“x2+2x≥ax在x∈[1,2]恒成立”等价于“对于x∈[1,2],有(x2+2x)min≥(ax)max”
④△ABC的内角A,B,C的对边分别为a,b,c,则“a>b”是“cos2A<cos2B”的充要条件.
其中说法正确的序号为( )
①命题“∃a>0,使函数f(x)=ax2+2x﹣1只有一个零点”为真命题
②命题“已知x,y∈R,若x+y≠3,则x≠2或y≠1”是真命题
③“x2+2x≥ax在x∈[1,2]恒成立”等价于“对于x∈[1,2],有(x2+2x)min≥(ax)max”
④△ABC的内角A,B,C的对边分别为a,b,c,则“a>b”是“cos2A<cos2B”的充要条件.
其中说法正确的序号为( )
A.①③ | B.①④ | C.②③ | D.②④ |
您最近一年使用:0次
名校
8 . 下列说法中,正确的序号为___________ .
①命题“
”的否定是“
”;
②已知
,则“
”是“
或
”的充分不必要条件;
③命题“若
,则
”的逆命题为真;
④若
为真命题,则
与
至少有一个为真命题;
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ca4ca1588eba01b231315b1c7d20a9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bfe039612ffb5d60214d5d6045f4a.png)
②已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcbca3478eae63853d2aab5332e2e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34cfaf8a1aac11be28a46922184c08ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57d087912775d73297b3614d3806ab29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc34a2d14b2f914017ae7b2a15ab60e.png)
③命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91bcddc2ece6bcde9355e222e1cf9f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
您最近一年使用:0次
解题方法
9 . 给出下列命题
(1)命题“
,
”的否定是“
,
”
(2)若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b804002ee3d72ff947cfc8426f90047c.png)
(3)已知
,
,若
,则a的取值范围是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a568a870b0c247e1abaf4bf65b83865.png)
其中正确命题的序号为( )
(1)命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad5fe274cfc8da2dacfb65801f344ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9490565d4714ffcbadb26fdfca443856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9490565d4714ffcbadb26fdfca443856.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b804002ee3d72ff947cfc8426f90047c.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0820285d82c98efc92ee43db58418fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f4cde12869125b1eebc2c6c8ae22cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f1ba0a1129741502600e47bf058c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a568a870b0c247e1abaf4bf65b83865.png)
其中正确命题的序号为( )
A.(2)(3) | B.(2) | C.(1)(3) | D.(1)(2) |
您最近一年使用:0次
名校
解题方法
10 . 给出下列四个结论:
①命题“
,
”的否定是“
,
”;
②已知
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212381ec0dbd7f351b18b78f2398ab3a.png)
;
③若
,且
,则
;
④函数
的最小值为2.
其中正确结论序号为_________________ .
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b267be39f7c364531991c398a8e8fe7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd189f8e2572c0ba9d8a85a1d9bbe43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0c949ecf36cde66db2ab00146f9f7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0d6e7859fe1c7bb920ca8b31f19a59.png)
②已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbd27695cdeb63ceba5fefe9443110e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a2ccb66eb414aefc79d784eddf974a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212381ec0dbd7f351b18b78f2398ab3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f86b86a6ccdf2c077d195db7bc380ea.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c38a21483a2dc328d2e0b1d1b62599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed670b1f668778c6243f3f7470ee7d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ea5d71ca3976bd564386b0607a26c6.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6155cbdc379b3d73414c7d76806fd6ff.png)
其中正确结论序号为
您最近一年使用:0次