1 . 有下列四个命题:
①对任意实数
均有
; ②不存在实数
使
;
③方程
至少有一个实数根; ④
使
,
其中假命题是__________ (填写所有假命题的序号).
①对任意实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2386f4fba94de69f5b6c0998bbc64441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264dab145ceba44696a6ee63b1e1549d.png)
③方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef85dce988111cd062503db4e4b4189.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccd7af9298cd5ff19d8866fedb42ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23c60d89efe873fcc094ea9865232ef7.png)
其中假命题是
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2 . 给定
,
,从正整数1,2,…,
中任意取出两个不同的数,记取出的两数之和等于
的概率为
,给出如下命题:
(1)当
取奇数时,有
恒成立;
(2)当
取偶数时,有
恒成立;
(3)对任意的
,有
恒成立;
(4)对任意的
且
,有
恒成立.
则其中为真命题的是_______ .(填写命题序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/774c3a400ce3c760b16e3ee46b8fb534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daac43c7675fa411b35028e09b0bad90.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6394c1890f5541323b6e3e3cfa736dd5.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb1a4c6d3e661298dbda6ce63dfbef78.png)
(3)对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e36bff57bcfa86432b340e25e51d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ecf511df8946cf0ad71929c431d5c3.png)
(4)对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e36bff57bcfa86432b340e25e51d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cb114f3d9d67cb4844b814af20612bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3859c1b1aa7b82804f33cbc6fab54db.png)
则其中为真命题的是
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名校
3 . 下列说法正确的是___________ (填写序号)
①命题“若
,则
”的逆否命题是“若
,则
”;
②“
”是“
”的充分不必要条件;
③若
为假命题,则
均为假命题;
④命题
,使得
,则
,均有
.
①命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fdf7d28b97fb6fe731703f80e122ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e30c903d8f8a05332af0b19e7e40df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a8a2a94168af9b16ce89271a5d8dc6b.png)
②“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fde64f4d3c38e43fbdee24eadc4b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e38581b43f437454b86dae0daed9a2f.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
④命题
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fac11dd95cb4b78adb817fad02dedb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/264dab145ceba44696a6ee63b1e1549d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19cd44731d509352f907c9773a42cab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1c77d129b56255baf3d76eb2a6c2ff.png)
您最近一年使用:0次
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|
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3卷引用:宁夏平罗中学2022届高三上学期第一次月考数学(文)试题
名校
解题方法
4 . 如图所示,在长方体
中,
,点
是棱
上的一个动点,若平面
交棱
于点
,给出下列命题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/cc4fce1e-276b-4eed-9181-b794bbb34d6d.png?resizew=184)
①四棱锥
的体积恒为定值;
②存在点
,使得
平面
;
③对于棱
上任意一点
,在棱
上均有相应的点
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
平面
;
④存在唯一的点
,使得截面四边形
的周长取得最小值.
其中真命题的是_____________ . (填写所有正确答案的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b378805114b83f76fcece53698a28d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dce95726804cf91de63f07b37c65da6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb16f7dbc4b9993c4efa0764df1d8ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6e92aadc02ae971ed29bb2db51b012f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e17230625e72d3a9c6d72ff61019ff61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b6a742dbacdab5aaa298007663dd4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/cc4fce1e-276b-4eed-9181-b794bbb34d6d.png?resizew=184)
①四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7c649d4bbd61eaef51e529ef9b1204.png)
②存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bac4ff764651106d9ab46855f20331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7759e75f16985d39b854e45774f06a86.png)
③对于棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb16f7dbc4b9993c4efa0764df1d8ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c23c66ab7d74f51cb4b79d1029fb38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc3e8a1475b983d1a4295db0e16d4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7003aee0b4b85f0fdd48ca9ae5826d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85bed42b435afda8e8c47dd0da8e4a1f.png)
④存在唯一的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422676748fd5d893c0e4331fee24e473.png)
其中真命题的是
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11卷引用:黑龙江省大庆市大庆实验中学2019-2020学年高三上学期期中数学(文)试题
黑龙江省大庆市大庆实验中学2019-2020学年高三上学期期中数学(文)试题湖南省邵阳市邵东县第十中学2020届高三下学期模拟考试数学(理)试题河北省张家口市第一中学2021届高三(衔接班)上学期期中数学试题宁夏银川一中2021届高三第六次月考数学(理)试题(已下线)专题4.5 立体几何中探索性问题-玩转压轴题,进军满分之2021高考数学选择题填空题宁夏银川一中2021届高三第六次月考数学(文)试题四川省成都市第八中学校2022-2023学年高三上学期第一次摸底考试文科数学试题河南省顶级名校2022-2023学年高三上学期12月摸底考试数学(文)试题四川省内江市2019-2020学年高二上学期期末数学(理)试题黑龙江省鹤岗市第一中学2020-2021学年高二10月月考数学(理)试题(已下线)模块三 专题3 小题满分挑战练(3)(人教B)
5 . 若函数
在区间
上的图像为连续不断的一条曲线,则下列说法正确的有__________ (填写编号).
①若
,则不存在实数
使得
;
②若
,则有且只有一个实数
使得
;
③若
,则可能存在实数
使得
;
④若
,则可能不存在实数
使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4776c85b79df196f606d3ebf3697fbc3.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84283f69972f5a5f5efc2e9651b2b5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd7fc0ca8a82663b87fa36afb9c4ec09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52060e238cf1e17a8101f2c47121c0a.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cd3c1b264eff8fe210ae2363ee22204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd7fc0ca8a82663b87fa36afb9c4ec09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52060e238cf1e17a8101f2c47121c0a.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84283f69972f5a5f5efc2e9651b2b5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84283f69972f5a5f5efc2e9651b2b5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52060e238cf1e17a8101f2c47121c0a.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cd3c1b264eff8fe210ae2363ee22204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd7fc0ca8a82663b87fa36afb9c4ec09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52060e238cf1e17a8101f2c47121c0a.png)
您最近一年使用:0次
2020-06-25更新
|
255次组卷
|
2卷引用:新疆维吾尔自治区乌鲁木齐市米东区乌鲁木齐市第101中学2023届高三上学期1月月考数学试题
名校
6 . 给出下列四个命题:
①正切函数
在定义域内是增函数;
②若函数
,则对任意的实数
都有
;
③函数
的最小正周期是
;
④
与
的图象相同.
以上四个命题中正确的有_________ (填写所有正确命题的序号)
①正切函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fffa8ddcbbe89ab0f250f56673e2d36c.png)
②若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d5dc063f9311309028c041927a0516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96aac4d81ce00ab3e438e2a4a761da5f.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d8878a9c2c037edccaa907e78375a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4665b078bc480b695c2f983a6a7ac9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59876c4008c5eaaad7507c4cbfca6137.png)
以上四个命题中正确的有
您最近一年使用:0次
2019-10-14更新
|
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|
4卷引用:宁夏青铜峡市高级中学2021届高三上学期第二次月考数学(理)试题
宁夏青铜峡市高级中学2021届高三上学期第二次月考数学(理)试题(已下线)考点13 三角函数的图象与性质-备战2022年高考数学一轮复习考点帮(浙江专用)湖南省怀化市2017-2018学年高一下学期期末考试数学试题重庆市渝北区、合川区、江北区等七区2019-2020学年高一(下)期末数学试题
7 . 给出下列四个命题:
①命题“若
,则
”的逆否命题;
②“
,使得
”的否定是:“
,均有
”;
③命题“
”是“
”的充分不必要条件;
④
:
,
:
,
且
为真命题.
其中真命题的序号是________ .(填写所有真命题的序号)
①命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa3205b1df826d63914dcb55bb3ab43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5426b6d35bef718963baa87e24131c09.png)
②“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0c7a319f1fb9ef4cd6bd9eb5ab0c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27942582c0d1ae33af058d2412138298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c780149aef1bd77162e85f7f8906a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c23a4b7f6952b9e323301bc917a94e99.png)
③命题“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2053e1f50472a9fed67d4c84d9cb938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10585d17770919fa97fbbfcbd59b3c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/676af6b030424b4ac5a941cbde53af05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
其中真命题的序号是
您最近一年使用:0次
2019-11-01更新
|
464次组卷
|
2卷引用:甘肃省武威市第十八中学2019年高三上学期10月月考数学试题
名校
8 . 下列有关命题的说法正确的是___ (请填写所有正确的命题序号).
①命题“若
,则
”的否命题为:“若
,则
”;
②命题“若
,则
”的逆否命题为真命题;
③条件
,条件
,则
是
的充分不必要条件;
④已知
时,
,若
是锐角三角形,则
.
①命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bad6987e8abfbf07d6a2650483d2a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bad6987e8abfbf07d6a2650483d2a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e30c903d8f8a05332af0b19e7e40df3.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b9d5aaaceaa3ac514d17fcfefbf9b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce22028b0472ba0c4db9c3179e963ad2.png)
③条件
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c6b1aa287ff58292b8ca13167a7423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c829d368dd8162aba35c5950d2a9e781.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
④已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba6c850df0d8e728fc545044cdd6a0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a673984ab88416f50a8496242427cdbe.png)
您最近一年使用:0次
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|
1013次组卷
|
9卷引用:【全国百强校】江苏省清江中学2018届高三学情调研考试数学试题
【全国百强校】江苏省清江中学2018届高三学情调研考试数学试题【全国百强校】宁夏石嘴山市第三中学2019届高三上学期期末考试数学(文)试题(已下线)专题2 常用逻辑用语(讲)-《2020年高考一轮复习讲练测》(江苏版)(已下线)专题2 常用逻辑用语(练)-《2020年高考一轮复习讲练测》(江苏版)(已下线)专题1.2 命题及其关系、逻辑联结词、充分条件与必要条件-《2020年高考一轮复习讲练测》(浙江版)(练)辽宁师范大学附属中学2018-2019学年高三上学期第一次模块考试数学(理)试题安徽省六安二中河西校区2018-2019学年高三上学期第三次统测文科数学试题(已下线)黄金卷04(2024新题型)甘肃省甘南藏族自治州合作第一中学2018-2019学年高二下学期期末考试数学(文)试题
名校
9 . 已知四个命题:①
,②
,③
,④
,正确命题的序号是______ .(填写所有正确答案的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481d70240bacc3d336b3e18912b311b2.png)
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2018高三·全国·专题练习
10 . 以下关于命题的说法正确的有________ (填写所有正确命题的序号).
①“若log2a>0,则函数f(x)=logax(a>0,a≠1)在其定义域内是减函数”是真命题;
②命题“若a=0,则ab=0”的否命题是“若a≠0,则ab≠0”;
③命题“若x,y都是偶数,则x+y也是偶数”的逆命题为真命题.
①“若log2a>0,则函数f(x)=logax(a>0,a≠1)在其定义域内是减函数”是真命题;
②命题“若a=0,则ab=0”的否命题是“若a≠0,则ab≠0”;
③命题“若x,y都是偶数,则x+y也是偶数”的逆命题为真命题.
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