名校
1 . 下列说法中,正确的是( )
A.命题“若![]() ![]() ![]() |
B.命题“若![]() ![]() ![]() ![]() |
C.命题“若![]() ![]() ![]() ![]() ![]() |
D.若命题p:![]() ![]() ![]() |
您最近一年使用:0次
名校
2 . 命题“若
,则
或
”的否命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25339da44bf61bf1c130f5f23e565018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bc1807f5f5784e75c4e5e6df17f3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88c2c4b82d87e769807270fc5361fde3.png)
A.若![]() ![]() ![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() | D.若![]() ![]() ![]() |
您最近一年使用:0次
2024-01-05更新
|
228次组卷
|
2卷引用:宁夏石嘴山市第三中学2016-2017学年高二上学期第二次月考数学(理)试题
名校
3 . 设
,
,若
是
的必要不充分条件,则实数
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a13d9a2ea1779b61df0bb20db8a0bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f859e866576f64c558bac1dbb92731f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e26b38e357c7d985656ba7bb3c794a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
4 . 命题“若
,则
”的否命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9f3afddf9878c2a1c7a9cbf35a0a7f.png)
A.“若![]() ![]() | B.“若![]() ![]() |
C.“若![]() ![]() | D.“若![]() ![]() |
您最近一年使用:0次
5 . 下列命题中的真命题是( )
①“若
,则
、
不全为零”的否命题;
②“若
,则
”的逆命题
③“
”的一个充分不必要条件是“
”.
④命题“在
中,若
,则
”的逆否命题
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0527f3801a1f5fae326d9411555b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
②“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f7c54faca6eac8af5309942062058d.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddb2170fbf89630f3f3ece1dab5de743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec02828c43cd3ae02e856666793b4424.png)
④命题“在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19dc38d888741a1b2e95fe0773a48c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
A.①②③④ | B.①③④ | C.②③④ | D.①④ |
您最近一年使用:0次
6 . 下述四个结论:
①命题“若
,则
”的否命题是“若
,则
”;
②
是
的必要而不充分条件;
③若命题“
”与命题“p或q”都是真命题,则命题q一定是真命题;
④命题“
,
”的否定是“
,
”.
其中所有正确结论的序号是( )
①命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3019b662e5dc2750bb6f9199d3250f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae9ba258299eb489b490594397e23c.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bfcffd48bd96e513072d998b69b6629.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
③若命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
④命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422cb62ad7fa8fdd0e8aeeea7011e06b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed3b92dce0908f398f1e2a924c0a72a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fa139aad70ad1ac124affc3fe5d75c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eaf63697e471166a52f2a04c6b4276b.png)
其中所有正确结论的序号是( )
A.①② | B.②③ | C.④ | D.②③④ |
您最近一年使用:0次
2023-05-13更新
|
677次组卷
|
3卷引用:河南省省直辖县级行政单位济源市2022-2023学年高二上学期期末数学理科试题
7 . 下列命题:其中真命题的个数是( )
(1)“若
,则
”的逆命题;
(2)“全等三角形面积相等”的否命题;
(3)“若
,则关于
的不等式
的解集为
”的逆否命题;
(4)命题“
为假”是命题“
为假”的充分不必要条件
(1)“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3798d6c2e5eac9c1d8b044efd5081acf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8501e7079043dc07dbdaaa9ea91917d6.png)
(2)“全等三角形面积相等”的否命题;
(3)“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920433c6a7f4e7adcb866e5f51fac8c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
(4)命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
名校
8 . 已知原命题:“若x<-2,则
”,则逆命题,否命题,逆否命题中,真命题的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bb9bace43ea5e7cb4de694b1765e92b.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
2023-02-16更新
|
273次组卷
|
3卷引用:内蒙古自治区兴安盟乌兰浩特市第四中学2022-2023学年高二上学期期中数学试题
名校
9 . 已知命题
:若
,则
,在命题
与其逆命题、否命题、逆否命题这四个命题中,真命题的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2c6eb4744f332ee2bbf938f5e1c683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7554ce3846def06c3b1a24936c96eaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
A.0 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2023-02-14更新
|
183次组卷
|
4卷引用:陕西省榆林市府谷中学2022-2023学年高二上学期第二次月考理科数学试题
名校
10 . 下面命题正确的是( )
A.“若![]() ![]() |
B.命题“若任意的![]() ![]() ![]() ![]() |
C.设![]() ![]() ![]() ![]() |
D.设![]() ![]() ![]() |
您最近一年使用:0次
2023-01-04更新
|
489次组卷
|
3卷引用:四川省成都市树德中学2022-2023学年高二上学期期末检测数学(理)试题