2014·江西南昌·二模
1 . 下列说法正确的是
A.命题“存在![]() ![]() ![]() ![]() |
B.两个三角形全等是这两个三角形面积相等的必要条件 |
C.函数![]() |
D.给定命题![]() ![]() ![]() ![]() |
您最近一年使用:0次
2013·湖南益阳·一模
2 . 有下列四种说法:
①命题:“
,使得
”的否定是“
,都有
”;
②已知随机变量
服从正态分布
,
,则
;
③函数
图像关于直线
对称,且在区间
上是增函数;
④设实数
,则满足:
的概率为
.其中错误的个数是 ( )
①命题:“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c7a319f1fb9ef4cd6bd9eb5ab0c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e4848e12d90125411fb07a7e524de6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87249dcd658c64cfa152b4c164b27e4c.png)
②已知随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19d04b28e5ef8671c6afd89b8e0dbe52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5327106a018d95a3c94129be2eb8e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c10f4cced8579092920fa0c932e5078.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc465aadfdec83e8bd3d7734afa66c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa072e56e4cdf7a02f5a67bd35dbabc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4814cc69393408433ac56a06c8e86855.png)
④设实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3367bd41ff428d7a608511cfb1f3cb11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a47463e9ae16a8339ff25e1adb3f293c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
A.0 | B.1 | C.2 | D.3. |
您最近一年使用:0次
2013·江西抚州·一模
3 . 下列命题中,正确命题的个数是
①命题“
,使得
”的否定是“
,都有
”.
②双曲线
中,F为右焦点,
为左顶点,点
且![](https://img.xkw.com/dksih/QBM/2014/12/26/1571933408108544/1571933413793792/STEM/98dd5ea8ff7a40a280e5728845efb11d.png)
,则此双曲线的离心率为
.
③在△ABC中,若角A、B、C的对边为a、b、c ,若cos2B+cosB+cos(A-C)=1,则
a、c、b成等比数列.
④已知
是夹角为
的单位向量,则向量
与
垂直的充要条件是
.
①命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/786921d44625369b0e89c3020f41fb2b.png)
![](https://img.xkw.com/dksih/QBM/2014/12/26/1571933408108544/1571933413793792/STEM/5004bfd4b5e048d59fe5cc63c155d714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d05bfb81fb639a2697789174ac6f21.png)
![](https://img.xkw.com/dksih/QBM/2014/12/26/1571933408108544/1571933413793792/STEM/5f84fc1b158346b8835686fa3c77dd32.png)
②双曲线
![](https://img.xkw.com/dksih/QBM/2014/12/26/1571933408108544/1571933413793792/STEM/e0584ba3a7574f56bb905577e1d289af.png)
![](https://img.xkw.com/dksih/QBM/2014/12/26/1571933408108544/1571933413793792/STEM/a0bcf998c2714f6f8b84704ddd38710c.png)
![](https://img.xkw.com/dksih/QBM/2014/12/26/1571933408108544/1571933413793792/STEM/f3f05bf285e748fcaae6320ea9d3aa11.png)
![](https://img.xkw.com/dksih/QBM/2014/12/26/1571933408108544/1571933413793792/STEM/98dd5ea8ff7a40a280e5728845efb11d.png)
![](https://img.xkw.com/dksih/QBM/2014/12/26/1571933408108544/1571933413793792/STEM/41933a410ce645b9a6dec7d11937cceb.png)
![](https://img.xkw.com/dksih/QBM/2014/12/26/1571933408108544/1571933413793792/STEM/023c173ef76d42a18131e1ecbc207085.png)
③在△ABC中,若角A、B、C的对边为a、b、c ,若cos2B+cosB+cos(A-C)=1,则
a、c、b成等比数列.
④已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c69613bda5b1face9751a8c13ae757ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a21e7c3cd84ab1feddfbe9e6f5c11ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ad83d500e69207bb1ba802750886d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56af257f25322eba53cf395a9c4ca447.png)
![](https://img.xkw.com/dksih/QBM/2014/12/26/1571933408108544/1571933413793792/STEM/34a169cd8a93489395c0ce42ff1054fc.png)
A.1 个 | B.2 个 | C.3 个 | D.4 个 |
您最近一年使用:0次
12-13高二上·浙江杭州·期末
4 . 下列有关命题的说法正确的是
A.命题“若![]() ![]() ![]() ![]() |
B.命题“若![]() ![]() |
C.命题“![]() ![]() ![]() ![]() |
D.“![]() ![]() |
您最近一年使用:0次
2012·福建漳州·一模
5 . 下列有关命题的说法正确的是
A.命题“若![]() ![]() ![]() ![]() |
B.“![]() |
C.命题“![]() ![]() ![]() ![]() |
D.命题“若![]() ![]() |
您最近一年使用:0次
2011·浙江杭州·一模
6 . 命题
“
”,那么命题
为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1077478edea8bef750ccf226c0643fbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2016-11-30更新
|
1245次组卷
|
3卷引用:2011届浙江省杭州市长河高三市二测模考数学理卷
(已下线)2011届浙江省杭州市长河高三市二测模考数学理卷四川省宜宾市叙州区第二中学校2020-2021学年高三上学期第一次月考数学(理)试题四川省宜宾市叙州区第二中学校2020-2021学年高三上学期第一次月考数学(文)试题
2010·河北·一模
7 . 下列有关命题的说法错误的是
A.命题“若![]() ![]() ![]() ![]() |
B.“![]() ![]() |
C.若![]() ![]() ![]() |
D.对于命题![]() ![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2011·吉林·一模
8 . 下列命题正确的是 ( )
A.命题![]() ![]() |
B.已知![]() ![]() ![]() |
C.已知线性回归方程是![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次