2016·上海·一模
1 .
表示一个三位数,记
,如
,则满足
的三位数共有______个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81b9e30652c00f64aec4a4069bdd704f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8126c14acd6d9c139f2295055ef1c19a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd2097643587be379524e1fb0bf9f1ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2030ef3a262dff91d392fdc967c0922a.png)
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2 . 设
为两个不同的点,直线l:ax+by+c=0,
.有下列命题:
①不论
为何值,点N都不在直线l上;
②若直线l垂直平分线段MN,则
=1;
③若
=-1,则直线l经过线段MN的中点;
④若
>1,则点M、N在直线l的同侧且l与线段MN的延长线相交.
其中正确命题的序号是__________ (写出所有正确命题的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2c3c28e400c9ede343fd8bd7f10b28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d65c73b4d498cf772db92a43c4b6fff.png)
①不论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700458c01a7ad031e27d80ed43e9e882.png)
②若直线l垂直平分线段MN,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700458c01a7ad031e27d80ed43e9e882.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700458c01a7ad031e27d80ed43e9e882.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700458c01a7ad031e27d80ed43e9e882.png)
其中正确命题的序号是
您最近一年使用:0次
3 . 定义函数
,若存在常数M,对于任意
,存在唯一的
,使得
,则称函数
在I上的“均值”为M,已知
,则函数
在
上的“均值”为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6afd57a02ee688d7e8bdbc6de7342387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492ad223929663945c3308099241d64a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7d1d5b0d1d62c83386d87825f789e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cecd441b7cd298c9cceb5c5ae529398c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b1bb972e80f8d949fbda8c28e8d67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce427e97019745d570dd2728027fba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73aea06e871a85a5048b59066eac2709.png)
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解题方法
4 . 设函数
与
是定义在同一区间
上的两个函数,若对任意的
,都有![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/0c252199a0be4f34a984b711c318d824.png?resizew=108)
,则称
与
在
上是“
度和谐函数”,
称为“
度密切区间”.设函数
与
在
上是“
度和谐函数”,则
的取值范围是____________
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/d6e948144d664fb5b7a76f8e5be4b83d.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/ec5dd6dc4322415ca3b9c604c4010f7b.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/7ee64531a5bc47c0b5de5170e3eee58a.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/60ee0991f18c454faa6a5ce1218c2671.png?resizew=60)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/0c252199a0be4f34a984b711c318d824.png?resizew=108)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/91038c9239c14be7bdd796b900fced87.png?resizew=48)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/d6e948144d664fb5b7a76f8e5be4b83d.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/ec5dd6dc4322415ca3b9c604c4010f7b.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/7ee64531a5bc47c0b5de5170e3eee58a.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/6aa157d3c91c4f19bde6bfbd96e80fac.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/7ee64531a5bc47c0b5de5170e3eee58a.png?resizew=36)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/6aa157d3c91c4f19bde6bfbd96e80fac.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/c437c113df704549ab126392f0e20dc6.png?resizew=75)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/90669df68938444a95f7934b00c3e724.png?resizew=91)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/24ece6fa1cae4f70ac67f73e54dff620.png?resizew=39)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/3d642339292741be97c1f391bfce1169.png?resizew=12)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016639008768/1572016644882432/STEM/49db843f645349b9a2fd4ec932a30c16.png?resizew=17)
您最近一年使用:0次
2010·广东·三模
名校
5 . 若对任意
,
有唯一确定的
与之对应,则称
为关于
,
的二元函数,现定义满足下列性质的
为关于实数
,
的广义“距离”.
(
)非负性:
,当且仅当
时取等号;
(
)对称性:
;
(
)三角形不等式:
对任意的实数
均成立.
给出三个二元函数:①
;②
;③
,
则所有能够成为关于
,
的广义“距离”的序号为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed006b944ea64f970fee46e2f558467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcc4d5f4cc4f20f44adbae0d2373681b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c3c1ed4fb65ab9505ad8078d8d0fb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c3c1ed4fb65ab9505ad8078d8d0fb5.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/f1c3c1ed4fb65ab9505ad8078d8d0fb5.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/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638df541efb3448608fbad59195e7c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b9d5aaaceaa3ac514d17fcfefbf9b4.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0d10d93a4cd75d6987cffce7ce7a84.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb1647c7592d692093ccb10ba99ff0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
给出三个二元函数:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f322b17f7284251845f84b376f2ec134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6820cb93dea9eb8430dc184664acb4b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c112be1d02723667d2932f0b18eab7ed.png)
则所有能够成为关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
2017-12-24更新
|
740次组卷
|
4卷引用:广东省华南师大附中2010届高三第三次模拟考试数学试卷(理科)
(已下线)广东省华南师大附中2010届高三第三次模拟考试数学试卷(理科)北京市西城区44中2018届高三上12月月考数学试题北京市西城44中2017届高三12月月考数学(理)试题2019年上海市上海中学高三下学期数学测试2数学试题
2010·河北石家庄·一模
6 . 给出定义:若
(其中
为整数),则
叫做离实数
最近的整数,记作
,即
. 在此基础上给出下列关于函数
的四个命题:
①
的定义域是
,值域是
;
②点
是
的图象的对称中心,其中
;
③函数
的最小正周期为
;
④ 函数
在
上是增函数.
则上述命题中真命题的序号是 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa7ff060f5bca0e57156032a5290868.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04f94d4765e15b1907d312d1e1b9c34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3991c2c6e92cc049f61b279eca883bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5eb0e0446575d1d2fd4a86df4ec396f.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f8368f7daaae96338581b7ad1e5d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c16479e8fe14f6e313cae599969e0a0.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7a914fd7ee59bc55e362330d577f1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f8368f7daaae96338581b7ad1e5d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99074f989e74d5ff306b4b7b7a379c1f.png)
③函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f8368f7daaae96338581b7ad1e5d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
④ 函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f8368f7daaae96338581b7ad1e5d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/436e72a8d59d98cdf6bed5f81fdc08b1.png)
则上述命题中真命题的序号是 .
您最近一年使用:0次
2016-12-02更新
|
729次组卷
|
6卷引用:河北省正定中学2010年高三一模模拟(三)数学理
(已下线)河北省正定中学2010年高三一模模拟(三)数学理(已下线)2014届四川成都市新津中学高三下学期二月月考理科数学试卷2015届四川省雅安中学高三1月月考理科数学试卷上海市风华中学2017届高三上学期期中数学试题(已下线)2012-2013学年江苏省涟水中学高二下学期期中考试文科数学试卷四川省遂宁市射洪中学2019-2020学年高一上学期第二次月考数学试题
7 . 已知函数
,
,
给出下列结论:
①函数
的值域为
;
②函数
在
上是增函数;
③对任意
,方程
在区间
内恒有解;
④若存在
,使得
成立,则实数a的取值范围是
.
其中所有正确结论的序号为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd2f0f50ad267a785a5b0533b3ebec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5edf76363e729212c4a4d9054079d1.png)
给出下列结论:
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff762e10a6d346f30a33bb7cc0004d5.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e7e05d1e0310f00c5dc79864f7b2c2.png)
③对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9587df831df1af5e7dd6be5fdc7bd8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5e7e05d1e0310f00c5dc79864f7b2c2.png)
④若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e387eb089b6e3a85b44f20194b1844c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e63bbadc6250f7139836ede33205550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/984ce854f05eb5ddd41fd6195035d3d1.png)
其中所有正确结论的序号为
您最近一年使用:0次
2015-10-28更新
|
1174次组卷
|
2卷引用:2016届吉林省实验中学高三上学期第一次模拟理科数学试卷1
8 . 在数列
中,若
为常数
,则
为“等方差数列”,下列是对“等方差数列”的判断;
①
是等方差数列,则
是等差数列;
②
是等方差数列;
③ 若
是等方差数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed8c521ba833022d7f57a4d44b2824f.png)
为常数
也是等方差数列;
④ 若
既是等方差数列,又是等差数列,则该数列为常数列.
其中正确命题序号为__________ .(将所有正确的命题序号填在横线上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ca1c0c66577dd728e61895ebc96b3ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c806dc9bf2cad0cb20220d23bd252a2f.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef891fc99921b6093392c1e3c5347d1.png)
③ 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bed8c521ba833022d7f57a4d44b2824f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b6a244eab64b41c3f98222feb04855.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
④ 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
其中正确命题序号为
您最近一年使用:0次