1 . 已知函数
,给出下列两个命题:命题
若
,则
;命题
,
.则下列叙述错误的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3a75c8b86df54a2b5b382ca7013de8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6de9ba514f822555dd1e9f18644b2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db722e68c7afd90387bb825e7131fd61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c164b3af73d31718a646dba1a20e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b092b3ba84bbcd717aeb9c5ea8d136.png)
A.p是假命题 | B.p的否命题是:若![]() ![]() |
C.![]() ![]() | D.![]() |
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2020-04-20更新
|
359次组卷
|
8卷引用:山西省运城市2019-2020学年高二下学期期末数学(文)试题
名校
2 . 命题“若
,则
”的逆否命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bad6987e8abfbf07d6a2650483d2a55.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
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2020-03-17更新
|
266次组卷
|
4卷引用:山西省太原市2019-2020学年高二上学期期末数学(理)试题
3 . 与命题“若实数
,则
”等价的命题是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a11a069688e4c797fcf527eab15afa82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8263a98c319b9c0f92b79ee2d47ec13.png)
A.若实数![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若实数![]() ![]() |
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4 . 下列命题:①空间中没有交点的两直线是平行直线或异面直线;②原命题和逆命题真假相反;③若
,则
;④“正方形的两条对角线相等且互相垂直”,其中真命题的个数为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0eef30a1357d8d8b6a2de0cd4e960e9.png)
您最近一年使用:0次
5 . 如果命题“
或
”是真命题,“
且
”是假命题.那么
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
A.命题![]() ![]() | B.命题![]() ![]() |
C.命题![]() ![]() | D.命题![]() ![]() |
您最近一年使用:0次
6 . 命题“在
中,若
,则
”的否命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20befb31b8e0deb0604491ab8ab7cd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b86d43790babcdbbdc03493ee70928.png)
A.在![]() ![]() ![]() | B.在![]() ![]() ![]() |
C.在![]() ![]() ![]() | D.在![]() ![]() ![]() |
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2020-02-09更新
|
163次组卷
|
2卷引用:山西省运城市2019-2020学年高二上学期期末数学理科试题
7 . 命题
:直线
与圆
相交,命题
方程
表示焦点在
轴上的椭圆.
(1)若命题
为真,求
的取值范围;
(2)若命题
为真,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/003b20efade12ac9eb93e84ae4e49833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/949b9ed1a03149554e15b7f2209a3e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b2480367cc4702919fc54391752f091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97842fd0ea2ea493566e5b4e363daa5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2020-01-28更新
|
322次组卷
|
2卷引用:山西省2019-2020学年高二上学期期末考试数学(文)试题
名校
8 . 命题“若
,则
”的逆否命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0aa2ef928b6e3341d0a0dc6d8055b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
您最近一年使用:0次
9 . 给出四个命题:①若x2﹣3x+2=0,则x=1或x=2;②若x=y=0,则x2+y2=0;③已知x,y∈N,若x+y是奇数,则x、y中一个是奇数,一个是偶数;④若x1,x2是方程x2﹣2
x+2=0的两根,则x1,x2可以是一椭圆与一双曲线的离心率,那么( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
A.③的否命题为假 | B.①的逆否命题为假 |
C.②的逆命题为真 | D.④的逆否命题为假 |
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10 . 设语句p:x=2,非q:x2﹣3x+2=0,则下列语句为真命题的是( )
A.p或q | B.P且q | C.若非p,则q | D.若q,则非p |
您最近一年使用:0次