1 . 原命题为“若
,则
”,在原命题及其逆命题、否命题、逆否命题这
个命题中,假命题的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0cee165c7a747253e69ab1a6e6a7076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 下列叙述中错误的是( )
A.若![]() ![]() |
B.命题“![]() ![]() ![]() ![]() |
C.命题“若![]() ![]() |
D.已知![]() ![]() ![]() |
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2021-11-21更新
|
445次组卷
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6卷引用:河南省辉县市第一高级中学2021-2022学年高二上学期第二次阶段性考试数学文数试题
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3 . 下列说法正确的是( )
A.“对任意一个无理数x,![]() |
B.“![]() ![]() |
C.命题“![]() ![]() ![]() ![]() |
D.“![]() ![]() |
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2021-11-18更新
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5卷引用:河南省伊川县实验高中2022-2023学年高一上学期第一次月考数学试题
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4 . 已知集合
,
,则下列命题中是真命题的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638c5d60aa6dd2032f391d11b934ce62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11fe7c643142e203b239d7c50b420033.png)
A.若![]() ![]() | B.若![]() ![]() |
C.若![]() ![]() | D.若![]() ![]() |
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5 . 给定下列命题:
①“若
,则方程
”有实数根;
②若
,
,则
;
③
:圆
内两条弦相等,
:圆
内两条弦所对的圆周角相等,
是
的充要条件;
④若
,则
,
中至少有一个为0.
其中真命题的序号是( )
①“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abea6224022b1908702d845fb4759f6.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d89ab55ffb93cc48f077b542dbd25aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f50ce6b511e6b928796e048fc7fa5c.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34715101c66fa12ce6baf0a9c53f1672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
其中真命题的序号是( )
A.①②③ | B.①②④ | C.①③④ | D.②③④ |
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6 . 已知命题
:“若
,则
”,记命题
的逆命题为
,则
与
的真假性为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f7c54faca6eac8af5309942062058d.png)
![](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.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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7 . 已知命题
:“
,
”的否定是“
,
”;命题
:
,
.下列说法不正确的是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64bd5b0dac2c5208eab0f04f75557f3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a38e5a3df541f5f4911cfb23cf891ac1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7068575610f97e9ef54191dd2670b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d8e95d03fb9d1c18c79f947ba629507.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b763aa9fa12125f166b4ebfe7edacbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b406ff8e1affe46d3fdd889688755b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2021-10-15更新
|
814次组卷
|
6卷引用:河南省实验中学2021-2022学年高三上学期期中考试 数学(文)试题
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8 . 下列命题中不正确的是( )
A.若命题p为真命题,命题q为假命题,则命题“p∨(¬q)”为真命题 |
B.命题“若a+b≠7,则a≠2且b≠5”为真命题 |
C.命题“若x2﹣x=0,则x=0或x=1”的否命题为“若x2﹣x≠0,则x≠0且x≠1” |
D.命题p:∃x>0,sinx>2x﹣1,则¬p:∀x>0,sinx≤2x﹣1 |
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2021-10-06更新
|
363次组卷
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3卷引用:河南省南阳市第一中学校2021-2022学年高二上学期第三次月考数学(理)试题
9 . 下面有四个命题:
①设一扇形的半径为
,面积为
,则这个扇形的圆心角的弧度数是
;
②设等边三角形
的边长为
,则向量
在向量
上的投影为
;
③若
,则
;
④设函数
图象的一条对称轴为直线
,则实数
的值为
.
所有正确命题的序号是_________ .(把你认为正确命题的序号都填上)
①设一扇形的半径为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2713679aa5f12e1d89d3a3d98b65212e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4467285b89285600704d469bf30bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
②设等边三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d792a2aa25763e14cc2863be3887000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef966cdd137b3b10e290201b4d17542e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a22b4929932fe9ccb2c51e5824d07f04.png)
④设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0aa6d3526ce93db7107f748e925c4f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24db7b603aebdee8e298d1fe49c848e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47153fdd73c0661fa460130082e30929.png)
所有正确命题的序号是
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10 . 下列叙述中正确的是( )
A.命题“∃x0∈R,2021x02-2x0+1≤0”的否定是“∃x0∈R,2021x02-2x+1>0” |
B.“a2=1”是“直线x+y=0和直线x-ay=0垂直”的充分而不必要条件 |
C.命题“若m2+n2=0,则m=0且n=0”的否命题是“若m2+n2≠0,则m≠0且n≠0” |
D.若p∨q为真命题,p∧q为假命题,则p,q一真一假 |
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