名校
1 . 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
名校
2 . 给出以下四个命题:
(1)命题
,使得
,则
,都有
;
(2)已知函数f(x)=|log2x|,若a≠b,且f(a)=f(b),则ab=1;
(3)若平面α内存在不共线的三点到平面β的距离相等,则平面α平行于平面β;
(4)已知定义在
上的函数
满足函数
为奇函数,则函数
的图象关于点
对称.
其中真命题的序号为______________ .(写出所有真命题的序号)
(1)命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fbaf82fe2b22d44492a001a7a02466c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22551fe4d3f29b606574a48d4233fe7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19cd44731d509352f907c9773a42cab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea8c817d58f773e1ab3b1f71165fd1e.png)
(2)已知函数f(x)=|log2x|,若a≠b,且f(a)=f(b),则ab=1;
(3)若平面α内存在不共线的三点到平面β的距离相等,则平面α平行于平面β;
(4)已知定义在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35ec1cb6fbf02f47e28ab85910ecbc8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8874d62dca6d0103ea753da86ac3bc65.png)
其中真命题的序号为
您最近一年使用:0次
2017-12-07更新
|
2418次组卷
|
9卷引用:【全国校级联考】安徽省肥东县高级中学2019届上学期高三8月调研考试数学(理)试题
【全国校级联考】安徽省肥东县高级中学2019届上学期高三8月调研考试数学(理)试题宁夏回族自治区固原市第一中学2017届高三上学期第5次月考数学(理)试题【全国百强校】山东省济南外国语学校2019届高三上学期第一次月考数学(理)试题(已下线)《2018-2019学年同步单元双基双测AB卷》【文科数学B】第一章第一练集合与简易逻辑(已下线)《2018-2019学年同步单元双基双测AB卷》【文科数学A】第二章第一练基本初等函数与函数性质的应用(已下线)《2018-2019学年同步单元双基双测AB卷》【理科数学A】第二章第一练基本初等函数与函数性质的应用(已下线)《2018-2019学年同步单元双基双测AB卷》【理科数学B】第一章第一练集合与简易逻辑内蒙古乌兰察布市集宁区集宁一中(西校区)2019-2020学年高二上学期12月月考数学(理)试题(已下线)专题01 集合与常用逻辑用语-【备战高考】2021年高三数学高考复习刷题宝典(填空题专练)
2010·黑龙江·三模
3 . 给出下列四个命题:
①设
,则
且
的充要条件是
且
;
②已知
,若
,则满足
的概率为
;
③命题“
”的否定是“
”;
④已知
个散点
的线性回归方程为
,若
,(其中
,
),则此回归直线必经过点
.
则正确命题序号为__________________ .
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4052657cfcf31f17fcd91b20d990cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca8325e253d8c7d9f93de39db5c4b20a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5e8836124e3cb45de298265c3265ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b281d412ab1d0d5d172d79a7d9fb588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e0031633e2cb3db1d8ec0ec0fed4609.png)
②已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6e3409a0f5a147d1d7f210cb76d9c9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79eea5c0bf58526a18067c2028869870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b022bff07068b3e9cbcb091bb347a9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32544f2492735703d3899efc6bd71865.png)
③命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0076626d24123c70424b358d581fd2de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a54e2fbb189c3dc05f9507ccdd6b43cb.png)
④已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f76fa9d4288753bc5facbcd1bf79428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708973e41ee9739f6fc8cd64c8006e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/600de07613f370932c6a630acb672913.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3126dae63b1642eb3a14b95aaf2300aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc703200e5471d3a5a23a2c69574c430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda105ec292aac7ab1485bd5031783fb.png)
则正确命题序号为
您最近一年使用:0次
4 . 下列说法中错误的是__________ .(填序号)
①命题“
,有
”的否定是“
,都有
”;
②若一个命题的逆命题为真命题,则它的否命题也一定为真命题;
③已知
为假命题,则实数
的取值范围是
;
④我市某校高一有学生600人,高二有学生500人,高三有学生550人,现采用分层抽样的方法从该校抽取33个学生作为样本进行某项调查,则高三被抽取的学生个数为12人.
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c42ef103bbb40a9c414ba273a16fa32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5eb2317908223dbeaa9a94bb2f7824c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/320bc7c67a144b274a92d77573181d27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
②若一个命题的逆命题为真命题,则它的否命题也一定为真命题;
③已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6339a735569209480cffcf99e603d550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731fffa7b63b5de570a88f814e0f8063.png)
④我市某校高一有学生600人,高二有学生500人,高三有学生550人,现采用分层抽样的方法从该校抽取33个学生作为样本进行某项调查,则高三被抽取的学生个数为12人.
您最近一年使用:0次
名校
5 . 下列说法中错误的是__________ (填序号)
①命题“
,有
”的否定是“
”,有
”;
②已知
,
,
,则
的最小值为
;
③设
,命题“若
,则
”的否命题是真命题;
④已知
,
,若命题
为真命题,则
的取值范围是
.
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281b260fe94c42258b7fa8c6bc6cefa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb9c2681fd202657c6d22201b738d19c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fdcb0d7eda2baefa352f1a01e6acbdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44d098a68a65c8c2b6c058cb17a903b.png)
②已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf35d6c316d9a014327ed3fdfeec374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a3df1ec9f4cc08c367980b39a931785.png)
③设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcbca3478eae63853d2aab5332e2e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34715101c66fa12ce6baf0a9c53f1672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c988d709ba8cd8aed6cb83d76c0ba89c.png)
④已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b598308dce900e042d195d6fa0ab67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3a6c2a598b6168200d5261996b8e3eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ba30151cfe5b33816cb59c11589e91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e93d6bae5b58d23fb85b8f54998da17.png)
您最近一年使用:0次
2018-02-07更新
|
2134次组卷
|
5卷引用:2017届江西省师大附中、临川一中高三1月联考数学(理)试卷
名校
6 . 下列说法中,正确命题的序号是________ .
①若命题“
”为真命题,则
,
恰有一个为真命题;
②命题“
,
”的否定是“
,
”;
③设
,
为非零向量,则“
”是“
与
的夹角为锐角”的充要条件;
④命题“函数
仅有一个零点”的逆否命题是真命题.
①若命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e48ebdd742cb5d310c21a384d599bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
②命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689c0ea661cce664e28a2f365715cbc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02491f9709f00a1bc169278fbe01f576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95b145698b0107112cef031d8af566ec.png)
③设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbc0945b4e1962e66f6f7e7f6af235d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
④命题“函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d730aeba9a7fe55d9bd8aaf2c165320.png)
您最近一年使用:0次
2022-03-10更新
|
569次组卷
|
3卷引用:陕西省渭南市2022届高三教学质量检测(一)理科数学试题
名校
7 . 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 |
您最近一年使用:0次
2020-04-21更新
|
468次组卷
|
6卷引用: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
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)