1 . 命题“若
,则
”的否命题是.
![](https://img.xkw.com/dksih/QBM/2017/2/2/1619476799152128/1619476799283200/STEM/ba65bc6424104789891f1a165edb21e6.png)
![](https://img.xkw.com/dksih/QBM/2017/2/2/1619476799152128/1619476799283200/STEM/ab1934a0b86a446884b0ffcf3af20337.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
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2 . 下列四个结论:
①若
,则
恒成立;
②命题“若
,则
”的逆否命题为“若
,则
”;
③“命题
为真”是“命题
为真”的充分不必要条件;
④命题“
”的否定是“
”.
其中正确结论的个数是
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80fcb77b3bdf39c6c3b6081c8663a6aa.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10805fbb6b50f351305edfa18c7fcfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f0e9c04402a0ffdaa25c3e3c82c7dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0563035d307e1e12c2ad967fd20fff11.png)
③“命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
④命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a92e233a5c90d5458ce9d63404eb764b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/126f2453fb2e47dee47a1eee77150236.png)
其中正确结论的个数是
A.1个 | B.2个 | C.3个 | D.4个 |
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2016-12-05更新
|
443次组卷
|
5卷引用:2017届四川凉山州高三理上学期一诊考试数学试卷
2014·四川资阳·一模
3 . 设
表示不超过x的最大整数,如:
.给出下列命题:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ab85825d4a002600ca41bd3cd2ee7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675fff37cfeca2af9c39ca5d03e84417.png)
①对任意实数x,都有;
②若,则
;
③;
④若函数,则
的值域为
.
其中所有真命题的序号是
您最近一年使用:0次
2016-12-03更新
|
863次组卷
|
3卷引用:2014届四川省资阳市高中高三下学期4月高考模拟考试文科数学试卷
(已下线)2014届四川省资阳市高中高三下学期4月高考模拟考试文科数学试卷湖北省天门、仙桃、潜江三市2016-2017学年高二下学期期末考试数学(理)试题湖北省天门、仙桃、潜江三市2016-2017学年高二下学期期末考试数学(文)试题
10-11高三下·湖南长沙·阶段练习
名校
4 . 下列说法中,正确的是
A.命题“若![]() ![]() |
B.命题“存在![]() ![]() |
C.命题“p或q”为真命题,则命题“p”和命题“q”均为真命题 |
D.已知![]() ![]() ![]() |
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2016-12-04更新
|
2014次组卷
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28卷引用:四川省成都市龙泉第二中学2017届高三5月高考模拟考试(一)数学(理)试题
四川省成都市龙泉第二中学2017届高三5月高考模拟考试(一)数学(理)试题(已下线)2012届新疆克拉玛依市实验中学高三4月模拟三理科数学试卷河南省2018届高三4月普通高中毕业班高考适应性考试数学(理)试题河南省2018届普通高中毕业班4月高考适应性考试数学(文)试题【区级联考】广东省广州市天河区2019届高三毕业班综合测试(二)理科数学试题【全国百强校】福建省厦门第一中学2019届高三5月市二检模拟考试数学(理)试题辽宁省沈阳市第三十一中学2019-2020学年高三第二次联考数学理试题(已下线)2011届湖南省长沙市长望浏宁四县高三3月调研考试数学文卷(已下线)2012届江西省上高二中高三第一次月考试卷理科数学(已下线)2012届陕西省西安市铁一中高三第二次月考文科数学试卷(已下线)2012届山东省日照一中高三第七次阶段复习达标检测理科数学试卷2015届湖北省襄阳市第五中学高三第一学期11月质检理科数学试卷2015-2016学年陕西省西安一中高二上学期12月月考理科数学试卷2015-2016学年河北省成安县一中高二1月月考理科数学试卷2015-2016学年吉林省扶余市一中高二上学期期末考试理科数学试卷2015-2016学年吉林省扶余市一中高二上学期期末考试文科数学试卷2017届河北武邑中学高三周考10.16数学(理)试卷2017届广东顺德李兆基中学高三理上月考二数学试卷山东省菏泽第一中学2018届高三上学期第一次月考数学(理)试题(已下线)2019年一轮复习讲练测【新课标版理】1.3简单的逻辑联结词、全称量词与存在量词(已下线)2019年一轮复习讲练测【新课标版文】1.3简单的逻辑联结词、全称量词与存在量词(练)【全国百强校】吉林省长春市实验中学2019届高三上学期开学考试数学(理)试题江西省吉安市吉州区吉安市白鹭洲中学2019-2020学年高三上学期11月月考数学(理)试题吉林省长春市德惠市九校2019-2020学年高二上学期期中数学(文)试题湖南省岳阳市岳阳县一中2020届高三(下)第一次段考数学试题(已下线)考点61 命题与逻辑用语(练习)-2021年高考数学复习一轮复习笔记湖北省武汉市部分重点中学2019-2020学年高三上学期起点考试数学(理)试题陕西省西安市长安区第一中学2021届高三下学期第七次质量检测文科数学试题
5 . 设m是一个非负整数,m的个位数记作
,如
,
,
,称这样的函数为尾数函数.给出下列有关尾数函数的结论:
①
;
②
,若
,都有
;]
③
;
则正确的结论的个数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee53de59dde51125e85976f971dc9d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941e386b4eaab6b92a9ebcc678734896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d798792867f5e328b969a4dfab54fc5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f94a1caa3d9007c8e0b337a27fd856d.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5448c0b24a1be067f25f8b3452c427.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/050f4807b669482d496e6bc086264fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17f3f0bf97c664d0bf86d450a0cb9592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/250f7c541bda2a5de97f7925c1d9664c.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b30766b4589c4288fe4193d37a71986f.png)
则正确的结论的个数为
A.3 | B.2 | C.1 | D.0 |
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6 . 给出下列三个命题:
①命题
:
,使得
, 则
:
,使得![](https://img.xkw.com/dksih/QBM/2015/3/24/1572024019116032/1572024024694784/STEM/0309c4edd98d4267a7c6d3d73740a584.png)
②
是“
”的充要条件.
③若
为真命题,则
为真命题.
其中正确命题的个数为
①命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/786921d44625369b0e89c3020f41fb2b.png)
![](https://img.xkw.com/dksih/QBM/2015/3/24/1572024019116032/1572024024694784/STEM/b27333d675dd4a0bad83767e2f1d48e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a037d29525d118dc083dc3e5e808ca2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d05bfb81fb639a2697789174ac6f21.png)
![](https://img.xkw.com/dksih/QBM/2015/3/24/1572024019116032/1572024024694784/STEM/0309c4edd98d4267a7c6d3d73740a584.png)
②
![](https://img.xkw.com/dksih/QBM/2015/3/24/1572024019116032/1572024024694784/STEM/4b2d1ae72daf45d5b08a8dcb9854a266.png)
![](https://img.xkw.com/dksih/QBM/2015/3/24/1572024019116032/1572024024694784/STEM/2a0f3f1eb3c24226aa3baa3b7f40ae74.png)
③若
![](https://img.xkw.com/dksih/QBM/2015/3/24/1572024019116032/1572024024694784/STEM/30f161c10af14f30bf55c8eba9610a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a31351c3868449fd115650c13152be8.png)
其中正确命题的个数为
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
2016-12-03更新
|
734次组卷
|
2卷引用:2015届四川省宜宾市高三第一次诊断考试理科数学试卷
2014·四川资阳·一模
7 . 设
表示不超过
的最大整数,如
,
.给出下列命题:
①对任意实数
,都有
;
②对任意实数
、
,都有
;③
;
④若函数
,当
时,令
的值域为A,记集合A的元素个数为
,则
的最小值为
.
其中所有真命题的序号是_________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ab85825d4a002600ca41bd3cd2ee7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ea02e718c638f94174db08de61ea3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b864f68977aaddd8435f1970f9886d4.png)
①对任意实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a3db6bb2a0792a77c68bca20cfe1aa.png)
②对任意实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2014/6/6/1571760007184384/1571760012591104/STEM/ee1452997b9949a3b274478e87ef2e5b.png?resizew=15)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6563c113e4801eecb133089940ab27c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52474631f4eb1a4a9eac5457ccfda5c8.png)
④若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eefd22192af0913e00964249ccc2263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dbca25e2ff608c466961dd9aea4e0db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5deee175c1448d248c4a6ece3e465da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47424eb68b9e8aba4ceb8309d82d32ec.png)
其中所有真命题的序号是
您最近一年使用:0次
2013·四川成都·一模
8 . 已知命题p:“若直线
与直线
垂直,则
”;命题q:“
”是“
”的充要条件,则
![](https://img.xkw.com/dksih/QBM/2013/8/29/1571332578451456/1571332583424000/STEM/1642eef073234e0f9b2c98c5a33f85bb.png)
![](https://img.xkw.com/dksih/QBM/2013/8/29/1571332578451456/1571332583424000/STEM/33b198bfbc344ec2895f2f9e7fb3c4d9.png)
![](https://img.xkw.com/dksih/QBM/2013/8/29/1571332578451456/1571332583424000/STEM/5ef7c237736641c9907ec77b3e1799d2.png)
![](https://img.xkw.com/dksih/QBM/2013/8/29/1571332578451456/1571332583424000/STEM/aa3d623bc2984f7099dc858f0fc49a94.png)
![](https://img.xkw.com/dksih/QBM/2013/8/29/1571332578451456/1571332583424000/STEM/68b150d7d49744b9b2c5d42758cb17c5.png)
A.p真,q假 | B.“![]() | C.“![]() | D.“![]() |
您最近一年使用:0次
2013·四川乐山·一模
名校
9 . 下列命题为真命题的是
A.若![]() ![]() |
B.“![]() ![]() |
C.命题“若![]() ![]() ![]() ![]() |
D.命题p:![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2016-12-02更新
|
880次组卷
|
5卷引用:2013届四川省乐山一中高三5月高考模拟理科数学试卷
2012·四川遂宁·一模
10 . 记
为不超过实数
的最大整数,例如,
,
,
.设
为正整数,数列
满足
,
,现有下列命题:
①当
时,数列
的前3项依次为5,3,2;
②对数列
都存在正整数
,当
时总有
;
③当
时,
;
④对某个正整数
,若
,则
.
其中的真命题有____________ .(写出所有真命题的编号
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/5b925d162bfc4a318451bad1de9ad8ad.png?resizew=23)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/ee1f89affe794fe28a117f4609b51d9c.png?resizew=14)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/28f3976fd0e74dcfa740282a0c341bd7.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/585434c31b274a3eb49fe551eb7c110e.png?resizew=54)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/31e2bd027744455983d7ad6b2278f8a7.png?resizew=74)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/4e4e78553d03415abc2b93bc28c798f1.png?resizew=14)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/3b4928d316ef4eabb5ddb44b63baadf0.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/c6f6a6dbfd564709871981504d79e9cf.png?resizew=42)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/afe2d5da14fa41dab475e950ae7ea768.png?resizew=166)
①当
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/6f139028b0714464a79f09f063c0e4e6.png?resizew=38)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/3b4928d316ef4eabb5ddb44b63baadf0.png?resizew=31)
②对数列
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/3b4928d316ef4eabb5ddb44b63baadf0.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/aa0c1e923f4c4bfca41504586d7ee39c.png?resizew=14)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/a6fd903d4ae44420b56481433e5ec9d8.png?resizew=38)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/697f7157508e423aa3561faa6f5f93cc.png?resizew=49)
③当
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/7010e667bfab43bdac2789b62e01af81.png?resizew=34)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/7f4c55d91a4f47b78d47b0509492088c.png?resizew=75)
④对某个正整数
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/aa0c1e923f4c4bfca41504586d7ee39c.png?resizew=14)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/307fd8cee4404a6da51acfd596455ca2.png?resizew=58)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1571014031548416/1571014037094400/STEM/3a599da3f566443f9ef3dd04bcd68a02.png?resizew=66)
其中的真命题有
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