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:![]() ![]() ![]() |
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2 . 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 |
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3 . 有下列四个命题:
①“若
,则
互为相反数”的逆命题;
②“若
,则
”的否命题;
③“若
是无理数,则
都是无理数”的逆命题;
④“若
,则
”的逆否命题.
其中真命题的序号是__________ .
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f1a686b80b8f109a929f58c2de7201d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
②“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f7c54faca6eac8af5309942062058d.png)
③“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
④“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0973815df3264c67f94eccde1c279ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1dbe0d4a121e1b69c2ad3b14d25d1e5.png)
其中真命题的序号是
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4 . 在下列命题中,属于真命题的有:____________
(1)
;
(2)命题“若
,则
或
”的逆命题为假命题;
(3)若命题
:
,则
:
;
(4)直线
与双曲线
交于
两点,若
,则这样的直线有3条.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9beaab3a2928f6a107df264574d74e7.png)
(2)命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19da8db4bf645326f7d46da8db520375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc91d92eb161e54def20b039d2089201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecdc78c604b10eba14ae694c84921076.png)
(3)若命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fa883aec93d3f6ff53c446f298ac49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f6a110c02cffd7e929a2c1c4bf3af4.png)
(4)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd5173dcf15131f9c01a4d62f2fdaea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dad0c75ce33673ec4c425896e8619e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf10573c5ea2b397b8721d1db7f5cc2f.png)
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5 . 给出下列说法:
①“若
,则
”的逆命题是假命题;
②“在△ABC中,
是
的充要条件”是真命题;
③
或
是
的充分不必要条件;
④命题“若
,则
”的否命题为“若
,则
”.以上说法正确的是________ (填序号).
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58ab5174edcf796e06fc85e28614432f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba75ca4ac87c18b45b5f420105f91f9.png)
②“在△ABC中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7725ad5bc8a8233f59ad3c4ccd7f465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa3638653a94a02420f176d860e294e.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b4ad6bf033c2de624a30b57402f9142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4738addce8080691ea629f831fcd17fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c47201a8f3f02096fd76b6a9b22680f.png)
④命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da6d82d173ad18cc040e94c925b5ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b051e1329de07b78b173b7980ea8ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629507dcfdeb6866da428c4f45e2b21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6b1fc85c324b4c4defdc8f1012d9ee.png)
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6 . 有下列四个命题:①“若
,则
”的逆命题;②“全等三角形的面积相等”的否命题;③“若
,则
有实根”的逆命题;④“若
,则
”的逆否命题.其中真命题的个数是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb728d4dd619984c683c3ad7b77b676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4176db941f1af7fcda4ee86c03427f63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b590cbcbf99bae490998fb7856ef671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdbbe46a98a8fdebfc46fcbc45dc88e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad78dc8b8aed907b4fe9640c997454.png)
您最近一年使用:0次
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7 . 下列命题:其中真命题的序号为( )
A.“若![]() ![]() |
B.“若![]() ![]() ![]() |
C.“周长相等的圆面积相等”的逆命题; |
D.“若![]() ![]() |
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2021-08-23更新
|
266次组卷
|
3卷引用:广东省普宁市勤建学校2021届高三上学期第一次调研数学试题
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8 . 在下列命题中,真命题是( )
A.“![]() ![]() |
B.“若![]() ![]() |
C.若![]() ![]() |
D.“相似三角形的对应角相等”的逆否命题 |
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9 . 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/9a8a2a94168af9b16ce89271a5d8dc6b.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
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2021-11-26更新
|
496次组卷
|
4卷引用:上海市金山区亭林中学2019-2020学年高一上学期期中数学试题
上海市金山区亭林中学2019-2020学年高一上学期期中数学试题宁夏六盘山高级中学2021-2022学年高二上学期第二次月考数学(理)试题(已下线)专题01 集合与逻辑(练习)-2(已下线)期中模拟预测卷01(测试范围:前三章)-2022-2023学年高一数学上学期期中期末考点大串讲(沪教版2020必修第一册)
10 . (1)判断四种命题的真假
(2)用充分条件和必要条件填空.
①A⊆B,则p是q的_________ ;
②若_________ ,则p是q的充分不必要条件;
③若B⊆A,则p是q的_________ ;
④若_________ ,则p是q的必要不充分条件;
⑤若A⊆B且B⊆A,即A=B,则p是q的_________ .
原命题 | 逆命题 | 否命题 | 逆否命题 |
真 | 真 | ||
真 | 假 | ||
假 | 真 | ||
假 | 假 |
①A⊆B,则p是q的
②若
③若B⊆A,则p是q的
④若
⑤若A⊆B且B⊆A,即A=B,则p是q的
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