1 . 下列命题正确的是
①“
”是 “
”的必要不充分条件;
②函数
的对称中心是
(
);
③“
”的否定是“
”;
④设常数a使方程
在闭区间[0,2
]上恰有三个解
,
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35bacde908aec2c313978fc4309d82bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7500649a06834aba5a778d624ab56ad6.png)
①“
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572051952041984/1572051957219328/STEM/9f62a5c7b5bb4e8db4be4c1c19ff3f94.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572051952041984/1572051957219328/STEM/3f6ed87ffc9f4daf908b128264d77e60.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb390c9f1102f2d17555d74ac243aa86.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572051952041984/1572051957219328/STEM/5ab1593eaa54456f97b07853af4644e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6029b3e81a9d7eeba4308d2362d35740.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d150f4f9281d03624e95313de93e256c.png)
![](https://img.xkw.com/dksih/QBM/2015/3/31/1572051952041984/1572051957219328/STEM/800a56a2bae146dfac913ff94ca16631.png)
④设常数a使方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677b901b829cd0725ad8915853accc62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d5adfe85535b699655d5ed2f3322d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/659be8fe3555d24e9b63f882a52df109.png)
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35bacde908aec2c313978fc4309d82bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7500649a06834aba5a778d624ab56ad6.png)
A.①③ | B.②③ | C.②④ | D.③④ |
您最近一年使用:0次
2 . 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
3 . 已知两个实数
,满足
,命题
;命题
.则下面命题正确的是
![](https://img.xkw.com/dksih/QBM/2015/3/12/1572004579082240/1572004584759296/STEM/9135991092be4ebcb736849db78c6601.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1572004579082240/1572004584759296/STEM/bc2dca57cc1349b48cb20557ec590ac6.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1572004579082240/1572004584759296/STEM/47558297bc234584ac04b5d228565ba9.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1572004579082240/1572004584759296/STEM/1c3d18fee32d41479eff4e6bbeb4ac6c.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
14-15高三上·四川·阶段练习
4 . 下列命题中的假命题是
A.$x∈R,lgx=0 |
B.$x∈R,tanx=2 |
C."x∈R,2x>0 |
D."x∈R,![]() |
您最近一年使用:0次
2014·四川资阳·一模
5 . 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
6 . 在实数集R中,我们定义的大小关系“>”为全体实数排了一个“序”.类似的,我们在平面向量集
上也可以定义一个称“序”的关系,记为“
”.定义如下:对于任意两个向量
,“
”当且仅当“
”或“
”.按上述定义的关系“
”,给出如下四个命题:
①若
,则
;
②若
,则
;
③若
,则对于任意
;
④对于任意向量
,若
,则
.
其中真命题的序号为__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a965af9e5b642eac59f2cce02a66d66.png)
![](https://img.xkw.com/dksih/QBM/2014/12/26/1571936737443840/1571936743333888/STEM/b23a3e6395414191af332e0bc940a28c.png?resizew=23)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41aed82593c7243215fb61bd72396407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa7079dfcebe900aa27605981e4a76c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2210f152080d9a68a97c805f5c1cde96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f088dba1c49a90372d33f199373f6ea7.png)
![](https://img.xkw.com/dksih/QBM/2014/12/26/1571936737443840/1571936743333888/STEM/b23a3e6395414191af332e0bc940a28c.png?resizew=23)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/378d6b5612e51eacc7071a2e5cd9b09e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364169e800302ecdbac0fc45931e9c22.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48bd5a837ffd88aba5eab249b43a206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd7c5aa14174df024274c2ab8912f7b9.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa7079dfcebe900aa27605981e4a76c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fd5cce0d8ba711ab80c4e0452ea9dc9.png)
④对于任意向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5cd5ae1973dec0e19abf9a8cd08315c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fa7079dfcebe900aa27605981e4a76c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf62422562ca7208352128beb54f4e6.png)
其中真命题的序号为
您最近一年使用:0次
2014·四川资阳·一模
7 . 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
13-14高三上·四川眉山·阶段练习
8 . 对于以下判断:
(1)命题“已知
”,若x
2或y
3,则x+y
5”是真命题.
(2)设f(x)的导函数为f'(x),若f'(x0)=0,则x0是函数f(x)的极值点.
(3)命题“
,ex﹥0”的否定是:“
,ex﹥0”.
(4)对于函数f(x),g(x),f(x)
g(x)恒成立的一个充分不必要的条件是f(x)min
g(x)max.
其中正确判断的个数是
(1)命题“已知
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/b2ddd308b69d403cae22814cbf20655a.png)
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/fd677740f7204520a1ffca73178050bc.png)
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/fd677740f7204520a1ffca73178050bc.png)
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/fd677740f7204520a1ffca73178050bc.png)
(2)设f(x)的导函数为f'(x),若f'(x0)=0,则x0是函数f(x)的极值点.
(3)命题“
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/666050d6fa164b389e1b476c46d294f0.png)
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/4620175de6c44db6bc2809db29206c1b.png)
(4)对于函数f(x),g(x),f(x)
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/e1b34d971e1947c5a4c084c292fb3da2.png)
![](https://img.xkw.com/dksih/QBM/2014/2/14/1571509205221376/1571509210324992/STEM/e1b34d971e1947c5a4c084c292fb3da2.png)
其中正确判断的个数是
A.1 | B.2 | C.3 | D.0 |
您最近一年使用:0次
2013·四川成都·一模
9 . 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
10 . 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