1 . 已知
,现有下列四个命题,其中的真命题是( )
①若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
②若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f00f997ae12c30f551adb834e1d7ef8.png)
③若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42dc22436b2a4edf3d6e15e1e5a15343.png)
④若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/815bf5f7a8a05efb4558df9fe0832605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ffbece8eaa48d6f874ad33257a0da6.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42dc22436b2a4edf3d6e15e1e5a15343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f00f997ae12c30f551adb834e1d7ef8.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42dc22436b2a4edf3d6e15e1e5a15343.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42dc22436b2a4edf3d6e15e1e5a15343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/815bf5f7a8a05efb4558df9fe0832605.png)
A.①④ | B.①② | C.②③ | D.③④ |
您最近一年使用:0次
名校
2 . 已知a,b,k是实数,函数
满足:
,
.在以下关于
的命题:①
的两个零点之差一定大于2;②
的零点都小于k﹔③
的零点都大于
,其中所有错误结论编号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80027540415bd2b98c9be19e21b5f8d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36cc81d3130f9d5937bdeef88530fa50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecac7c5ce27ee764389acab1964e93b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432851e0d0b7a2924da29b9cc5ca1706.png)
A.①② | B.②③ | C.①③ | D.①②③ |
您最近一年使用:0次
名校
3 . 下列选项叙述正确的是( )
A.命题“若![]() ![]() ![]() ![]() |
B.已知i为虚数单位,复数z满足![]() ![]() |
C.若命题P:![]() ![]() ![]() ![]() |
D.“![]() ![]() |
您最近一年使用:0次
2021-02-09更新
|
61次组卷
|
2卷引用:江西省都昌县第二中学2020-2021学年高二下学期期中考试数学(文)试题
名校
4 . 下列说法正确的是( )
(1)已知函数
在区间
上的图象是连续不断的,则命题“若
,则
在区间
内至少有一个零点”的逆命题是假命题
(2)“
”是“直线
和直线
互相垂直”的充要条件:
(3)命题“已知A,B为一个三角形的两内角,若
,
”的否命题为真命题
(4)命题“若
,则
”的逆否命题是真命题.
(1)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c4a9ab39641a5109021f98e44a687a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
(2)“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca529f4c3c93db2bb1728466d616c5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aca3272c91ba9773f1c8342cdfdc432.png)
(3)命题“已知A,B为一个三角形的两内角,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a70d32c64918aa4d1d9d3ce0bdbf7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19acddff4cb3831a8e8974e532c05242.png)
(4)命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5426b6d35bef718963baa87e24131c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5fca5062d79546253d025cf3cd59839.png)
A.(1) | B.(2)(3) | C.(1)(3) | D.(1)(4) |
您最近一年使用:0次
2021-01-24更新
|
990次组卷
|
3卷引用:江西省吉安市永丰县永丰中学2020-2021学年高二下学期期中考试数学(文)试题
5 . 有下列四个命题:①“若
,则
,
互为倒数”的逆命题;②“面积相等的三角形全等”的否命题;③命题“若
,则
”的逆否命题;④“若
,则方程
有实数解”的逆否命题;其中真命题个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377a2333ff8c63cbdb20b882d6d5a7ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850f6874ea501c6021573701b0294dcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347c62b44fae618a37c145b3b5d1f1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5707186257494f1fea86066f2778b5.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
名校
6 . 给出如下四个命题:
①若“
且
”为假命题,则
均为假命题;
②命题“若
,则
”的否命题为“若
,则
”;
③“
,
”的否定是“
,
”;
其中正确的命题的个数是( )
①若“
![](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/d3f87fbbd5c55339ec9601ce6772ebea.png)
②命题“若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d499e8ca8a0c2c810507e34456181577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/630d2254e86f7983f66bfc65e7760d51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d39f63380f7f1b57b2441522692678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d21db82627fb40877050833c5d694e5f.png)
③“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff39e9af126fd7f909437e2a0f35324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3acf0adb0fef5d314a104e2ce9ef9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3fe7728afebda375b4b2a001ea01965.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f45b2cfb0f60b3412991ab1996cbc9d.png)
其中正确的命题的个数是( )
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
2020-10-14更新
|
1127次组卷
|
4卷引用:江西省吉安县立中学2020-2021学年高二上学期期中考试数学(文)试题
名校
7 . 设
,命题“若
,则方程
有实根”的逆否命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4c78214e43a8b93f2a57072033cbcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/437bceb596deddba816acf6e44e2d2ee.png)
A.若方程![]() ![]() |
B.若方程![]() ![]() |
C.若方程![]() ![]() |
D.若方程![]() ![]() |
您最近一年使用:0次
2020-08-16更新
|
235次组卷
|
2卷引用:江西省吉安县立中学2020-2021学年高二上学期期中考试数学(文)试题
名校
8 . 下列命题是真命题的是
A.命题![]() ![]() ![]() |
B.命题“若![]() ![]() |
C.命题“若![]() ![]() ![]() ![]() |
D.“命题![]() ![]() |
您最近一年使用:0次
2020-08-08更新
|
195次组卷
|
7卷引用:江西省赣州市部分重点中学2021届高三上学期期中考试文科数学试题
江西省赣州市部分重点中学2021届高三上学期期中考试文科数学试题四川省遂宁市射洪县射洪中学等2019-2020学年高三上学期第四次大联考数学(文)试题四川省遂宁市射洪县射洪中学等2019-2020学年高三上学期第四次大联考数学(理)试题重庆市第一中学2019-2020学年高三下学期3月月考数学(文)试题广西南宁市第三中学2019-2020学年高二下学期月考(三)数学(文)试题(已下线)专题16 常用逻辑用语-2020年高考数学(理)母题题源解密(全国Ⅱ专版)(已下线)专题16 常用逻辑用语-2020年高考数学(文)母题题源解密(全国Ⅱ专版)
解题方法
9 . 下列说法正确的是( )
A.若![]() ![]() ![]() ![]() ![]() ![]() |
B.命题“已知![]() ![]() ![]() ![]() |
C.“![]() ![]() ![]() ![]() ![]() |
D.函数![]() |
您最近一年使用:0次
名校
10 . 命题“若
,则
”的逆否命题是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c988d709ba8cd8aed6cb83d76c0ba89c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea5977232839b54df456aeeacb13512d.png)
A.若![]() ![]() | B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() | D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
2020-07-11更新
|
350次组卷
|
8卷引用:江西省永丰县永丰中学2020-2021学年高二上学期期中考试数学(文)试题
江西省永丰县永丰中学2020-2021学年高二上学期期中考试数学(文)试题四川省绵阳市三台县2019-2020学年高二下学期期中教学质量调研测文科数学试题四川省绵阳市三台县2019-2020学年高二下学期期中教学质量调研测理科数学试题江西省上饶中学2019-2020学年高二下学期期末考试数学(理)试题四川省内江市威远中学2020-2021学年高二下学期期中考试数学(理)试题新疆伊宁市第四中学2021届高三上学期第三次月考数学(理)试题四川省内江市资中县球溪高级中学2021-2022学年高二下学期5月月考数学(文)试题专题02 常用逻辑用语-2020-2021学年高一数学北师大2019版必修第一册