名校
1 . 下列结论正确的是__________ .①在某项测量中,测量结果
服从正态分布
.若
在
内取值的概率为0.35,则
在
内取值的概率为0.7;②以模型
去拟合一组数据时,为了求出回归方程,设
,其变换后得到线性回归方程
,则
;③已知命题“若函数
在
上是增函数,则
”的逆否命题是“若
,则函数
在
上是减函数”是真命题;④设常数
,则不等式
对
恒成立的充要条件是
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb64f48ee5b09252459be47bbd3c3f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1242ec96ac54e2fd418988d5190a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094cba781181aeb90752170e9ba6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fad3ff5f4d656390df3c9558f8cdc82e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d28162b2a8309f0f7f193e733be414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11fd3f8b232a05d4ba000c4d10ae1271.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e776c5ac07697dbc9284b4a04948c0bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ffa7a797dc90cb5d854d4b6eb81bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347c62b44fae618a37c145b3b5d1f1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e34f42b3be15518c29e3689c9fe6d6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ffa7a797dc90cb5d854d4b6eb81bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870ebc2f7aabb028024894568d749934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a66b19a1bc76f5d1b9a9c43b1656e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2533cbdd4c3efd2d3159b396d6064b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fad1dd76d5b72f10f5bb62693a2996f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7657ae5f17ffd1ba15867430103c729.png)
您最近一年使用:0次
2016-12-05更新
|
300次组卷
|
2卷引用:2017届四川省南充高级中学高三3月月考数学(理)试卷
2012·四川自贡·三模
2 . 对于三次函数
,定义
是
的导函数
的导函数,若方程
有实数解
,则称点
为函数
的“拐点”,可以证明,任何三次函数都有“拐点”,任何三次函数都有对称中心,且“拐点”就是对称中心,请你根据这一结论判断下列命题:
①任意三次函数都关于点
对称:
②存在三次函数
有实数解
,点
为函数
的对称中心;
③存在三次函数有两个及两个以上的对称中心;
④若函数
,则: ![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/cbdd6b14556e4870b23f8c1dcfe4e3ad.png?resizew=373)
其中正确命题的序号为_____ (把所有正确命题的序号都填上).
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/21ac331a5b0e4b30b00b0bfc8770a14a.png?resizew=213)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/60cd76baa3484586a3fab13c0e7d75f7.png?resizew=41)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/ca5c67acb37e4344aca4776bfadbb516.png?resizew=61)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/9b22cb4ef676428f863b199d569eff7a.png?resizew=65)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/4aeca168313f4352a09e9371cf7fe4f8.png?resizew=67)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/bed6f27974b441c4901f45d1999f3071.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/4a1972c93ff74273a10d6e3a25e47433.png?resizew=75)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/ca5c67acb37e4344aca4776bfadbb516.png?resizew=61)
①任意三次函数都关于点
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/86f6c82c145b4959a4570a0ff352e9e1.png?resizew=104)
②存在三次函数
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/9263178288534479a8555ceebddfcf6e.png?resizew=64)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/bed6f27974b441c4901f45d1999f3071.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/4a1972c93ff74273a10d6e3a25e47433.png?resizew=75)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/ca5c67acb37e4344aca4776bfadbb516.png?resizew=61)
③存在三次函数有两个及两个以上的对称中心;
④若函数
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/6f90ab20b1234a0b8c61bb78c5026c69.png?resizew=155)
![](https://img.xkw.com/dksih/QBM/2013/6/7/1571240628027392/1571240633196544/STEM/cbdd6b14556e4870b23f8c1dcfe4e3ad.png?resizew=373)
其中正确命题的序号为
您最近一年使用:0次
3 . 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 |
您最近一年使用:0次
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
4 . 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
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2013·四川成都·一模
5 . 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.“![]() |
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名校
6 . 下列说法正确的是
A.“![]() ![]() |
B.命题“![]() ![]() ![]() ![]() |
C.关于![]() ![]() ![]() |
D.命题“在![]() ![]() ![]() |
您最近一年使用:0次
2016-12-05更新
|
424次组卷
|
2卷引用:2017届四川省南充高级中学高三3月月考数学(文)试卷
10-11高三下·四川成都·阶段练习
7 . 下列命题中:①函数
的最小值是
;②在
中,若
,则
是等腰或直角三角形;③如果正实数
满足
,则
;④如果
是可导函数,则
是函数
在
处取到极值的必要不充分条件.其中正确的命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/521be0b8fd38920c5e403e0bbbd773ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b883d9703a1deaf8dbc18097c6b8bb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf538440bd45e5881f2b22994560ba7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cbce35ea5e95e9947ab7f3f54d0227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1260c6fa15a4d739a41c5de1533e9e5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abb76da45ffa52b47c3a6b9a03ac7e.png)
A.①②③④ | B.①④ | C.②③④ | D.②③ |
您最近一年使用:0次