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 . 已知命题p:
,不等式
恒成立;
:方程
表示焦点在
轴上的椭圆.
(1)若
为假命题,求实数
的取值范围;
(2)若
为真命题,
为假命题,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64f663326aee04070ddb9c50b54e15e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62fd614795f325c99219d46c74183ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f5306a2b75f6a1b64f36419dfd678e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2019-05-17更新
|
1524次组卷
|
8卷引用:江西省鹰潭市贵溪市第一中学2021-2022学年高二上学期期中考试数学(文)试题
江西省鹰潭市贵溪市第一中学2021-2022学年高二上学期期中考试数学(文)试题【全国百强校】江西省上饶市玉山县第一中学2018-2019高二下学期期中考试数学(文)试题河北省石家庄二中雄安校区2019-2020学年高二上学期期中考试数学试题四川省广安市武胜烈面中学校2021-2022学年高二上学期期中测试数学(理)试题吉林省长春市实验中学2019-2020学年高二上学期10月月考数学(文)试题宁夏银川市景博中学2021-2022学年高二上学期第二次月考数学(理)试题四川省南充高级中学2022-2023学年高二上学期期末考试数学(理科)试题四川省南充高级中学2022-2023学年高二上学期期末考试文科数学试题
真题
名校
4 . 设
为正实数,现有下列命题:
①若
,则
;
②若
,则
;
③若
,则
;
④若
,则
.
其中的真命题有____________ .(写出所有真命题的编号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88592d9e21b5201fe1c5f39bf240845e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb9c7fcfa0915ac93afa4273ea66178.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7337cbb1a84fce3507a5e85b8d3ec2af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb9c7fcfa0915ac93afa4273ea66178.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ee6c1d4a1d75ec149691e1747bc610.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67560c84eec85e231c491d9b1fd041c0.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd2f3502c0dfc9f63e7f14c2dfdf5574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67560c84eec85e231c491d9b1fd041c0.png)
其中的真命题有
您最近一年使用:0次
2019-01-30更新
|
1429次组卷
|
9卷引用:2013-2014学年江西省余江一中高一下期期中考试数学试卷
(已下线)2013-2014学年江西省余江一中高一下期期中考试数学试卷上海市华东师范大学第一附属中学2020-2021学年高一上学期期中数学试题2012年全国普通高等学校招生统一考试文科数学(四川卷)(已下线)2012-2013学年甘肃省秦安二中高二下学期期末考试文科数学试卷宁夏回族自治区银川一中2019-2020学年高二下学期期末考试数学(理)试题(已下线)第12课 不等式及其性质-2020-2021学年高一数学上学期课时同步练(人教B版2019必修第一册)(已下线)2.1.2等式性质与不等式的性质-【新教材】人教A版(2019)高中数学必修第一册同步练习(已下线)2.1.2 等式性质与不等式性质-2021-2022学年高一数学考点讲解练(人教A版2019必修第一册)北京名校2023届高三一轮总复习 第6章 不等式 6.1 不等关系与不等式的性质
名校
5 . 给出以下命题:
(1)若
:
;
:
,则
为真,
为假,
为真
(2)“
”是“曲线
表示椭圆”的充要条件
(3)命题“若
,则
”的否命题为:“若
,则
”
(4)如果将一组数据中的每一个数都加上同一个非零常数,那么这组数据的平均数和方差都改变;
则正确命题有个
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74948aa672549c977a92ee3d01b0f519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1700f6e6e4b6ac308a3063c5d93782a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f675824e539f50cec53120959d32e554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
(2)“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d61f98f7418eda31a1d7c457e3841c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db040ac73e323a132ccac7bee4013fa3.png)
(3)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)
(4)如果将一组数据中的每一个数都加上同一个非零常数,那么这组数据的平均数和方差都改变;
则正确命题有个
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-03-22更新
|
424次组卷
|
3卷引用:江西省鹰潭市贵溪市第一中学2021-2022学年高二上学期期中考试数学(文)试题
14-15高二上·江西赣州·期末
6 . 已知命题
“存在
”,命题
“曲线
表示焦点在
轴上的椭圆”,命题
“曲线
表示双曲线”
(1)若
是真命题,求
的取值范围.
(2)若
是
的必要不充分条件,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676781760512/1572676787322880/STEM/5c30948d4c0c44c688159f5871692b1e.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676781760512/1572676787322880/STEM/6a7ce8ec1cf844c0a171b1afdea43a29.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676781760512/1572676787322880/STEM/3728c07d5eac484da92df709484afb7d.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676781760512/1572676787322880/STEM/fda6af107f19498cb1c0907d4b151970.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676781760512/1572676787322880/STEM/ff678e89b7a64d9f831cb96622bcccdc.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676781760512/1572676787322880/STEM/b95109ad1a454186ac916063962d2049.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676781760512/1572676787322880/STEM/27afa60825df4c7195f85e05b05c9841.png)
(1)若
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676781760512/1572676787322880/STEM/3de0bb45ed2844798d83b71a53695664.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676781760512/1572676787322880/STEM/518e67732b5945b1b5cec90570c3b2e0.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676781760512/1572676787322880/STEM/3589d455041c4a16b4f38ba965ca2c9a.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676781760512/1572676787322880/STEM/2c3f363757384867afd72390c433d481.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572676781760512/1572676787322880/STEM/d9ba1d39b6494aa3b91b986e5fd2f59b.png)
您最近一年使用:0次
2016-12-02更新
|
6302次组卷
|
10卷引用:2014-2015学年江西省余江一中高二上学期期中考试理科数学试卷
2014-2015学年江西省余江一中高二上学期期中考试理科数学试卷(已下线)2013-2014学年江西赣州六校高二上学期期末联考理科数学试卷2015-2016学年河南省信阳高中高二12月月考文科数学卷2015-2016学年河南省信阳高中高二上12月月考文科数学试卷2015-2016学年河南省信阳高中高二12月考理科数学试卷2015-2016学年河南省许昌高中等校高二下第一次联考理科数学试卷2015-2016学年河南省许昌高中等校高二下第一次联考文科数学试卷2015-2016学年河南省驻马店市高二上学期期末文科数学试卷2015-2016学年湖北省襄阳市白水高中高二下3月月考文科数学试卷2015-2016学年江西省宜春市奉新一中高二上期末文科数学试卷