解题方法
1 . 已知函数
与
的定义域均为
,若对任意的
都有
成立,则称函数
是函数
在
上的“L函数”.
(1)若
,判断函数
是否是函数
在
上的“
函数”,并说明理由;
(2)若
,函数
是函数
在
上的“
函数”,求实数
的取值范围;
(3)若
,函数
是函数
在
上的“
函数”,且
,求证:对任意的
都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a6a9ed9d70c6619c74005415d3588fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68db6e36fd1f5476ffdf477dd19cd4e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2fc1feeee63c07580cbcd939dbcc040.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee10b15238789eff8bcc496fa524cb34.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe791d2c2fd83c4b760b18c2840e3b30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee10b15238789eff8bcc496fa524cb34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6efb58dbb753f64a8fce14195267f371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee10b15238789eff8bcc496fa524cb34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d7eb680d308a98a94cd3344ff319165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a6a9ed9d70c6619c74005415d3588fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee1adbc016cbdc0db34e13a58b30ef8.png)
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2 . 已知函数
的定义域为
,且对任意的正实数
、
都有
,且
.
(1)求证:
;
(2)求
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.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/25bea6d14c16f7c06e4e028f36131360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207717d14e7d941837b2613fec7694e3.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3471484b64504fc545398f52be830010.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b158eda7b571588ee5841dcd22c0b5cf.png)
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3 . 集合
由有限个实数组成,定义集合
的离距
如下:实数轴上,集合
中的每个实数
对应一个点
,实数
对应的点
与所有这些点
的距离的算术平均数记为
,称函数
的最小值为集合
的离距,记为
.例如,集合
的离距是0,集合
的离距是2.
(1)分别求出集合
的离距;
(2)求数集
的离距;
(3)已知非空数集
满足
,试写出一个关于
的大小关系的等式或不等式,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fdb777c90f9cabba8d4ed34c16f4acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e51c8010a4568d7d44f261973dea420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fdb777c90f9cabba8d4ed34c16f4acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39412925212a989c503e891db840609d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c6fed9c3cf2c00ba1823c3f0a05615.png)
(1)分别求出集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7384a3e8b9a7ffb00bb124ba97b7c992.png)
(2)求数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22accc2928d3370f48a84cc4703a4b07.png)
(3)已知非空数集
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21e6c4bb62b14f8e70d8f8b1ac911bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3598ab9c4ac9a9496c5f34b9b5fda3cf.png)
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4 . 设
,求证:
(1)
;
(2)
(
,且
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad292a5e3f68651844e4207b9b594bf.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe21c0d4c2ef5ea9e2ddd69534d37193.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ad4c3cb38a5ce9b06167ce7217453d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31be670d32e753012125c503f2f3be56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f0e9c04402a0ffdaa25c3e3c82c7dd.png)
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5 . 设
,
(1)求证:
,
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd056fe6bde85d1452489f57a7d3bec.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d697832e4006f4392113a62cf83b1116.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/395029006ef4d999269d024608a0a0ac.png)
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解题方法
6 . 已知集合A为数集,定义
.若
,定义:
.
(1)已知集合
,直接写出
,
及
的值;
(2)已知集合
,
,
,求
,
的值;
(3)若
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de527cec4114ceaa27f3d5b7f8e5fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d29488289a3db7cb65894175be30f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d7e2e5ccdad8b47fc0806607620820.png)
(1)已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45162ca60403d0d044c73a51dee654aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f03e23c5f50122bd65c621c69f301f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6736b4cf3b5d77b25fff47f5325ab8cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/097a5083399b56ae6d34a5482ae6d23b.png)
(2)已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca717c6a55e786238e64f7ebd69b9b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c105e7649e4eff5001fd62952855ec1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d3e5d65f77e868e505e905f0d909187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3bcb4828b16c8e845492f1a53ddd9a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a6e825795c828f8281e93607d0e1b1.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f03916a8247604a610e1a93424cb1ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24307d79a1906db6176f80389b5c5004.png)
您最近一年使用:0次
名校
解题方法
7 . 已知二次函数
的解为
.
(1)求
;
(2)证明:
也是方程
的解,并求
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8812d3345992f58cc1f80c87b00105ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2734b6268b3476edb7b956e92596f9e4.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a475fec8ded321e10a6697319fb975.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2734b6268b3476edb7b956e92596f9e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801d492de7ae12be2bf576f25c4f1ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801d492de7ae12be2bf576f25c4f1ceb.png)
您最近一年使用:0次
2024-01-10更新
|
316次组卷
|
2卷引用:河北省NT20名校联合体2023-2024学年高一上学期12月月考数学试卷
名校
8 . 设函数
,已知不等式
的解集为
.
(1)求不等式
的解集;
(2)若定义在区间D上的函数
对于区间D上任意
都有不等式
成立,则称函数
在区间D上为凸函数.请你根据凸函数的定义证明:
在R上是凸函数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c33152380c77e8af3a7cf27776fe933.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cecf90d901db55e00b5c2be9b6d9c085.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08fb7106798a38f64d7ffe5ed724f1c8.png)
(2)若定义在区间D上的函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66237d544d8a709472402562586c7a48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c33152380c77e8af3a7cf27776fe933.png)
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2023-10-11更新
|
286次组卷
|
3卷引用:河南省郑州市第四高级中学2023-2024学年高一上学期第一次调考考试数学试题
名校
9 . 设集合
为
元数集,若
的2个非空子集
满足:
,则称
为
的一个二阶划分.记
中所有元素之和为
中所有元素之和为
.
(1)若
,求
的一个二阶划分,使得
;
(2)若
.求证:不存在
的二阶划分
满足
;
(3)若
为
的一个二阶划分,满足:①若
,则
;②若
,则
.记
为符合条件的
的个数,求
的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e05aa7f57c4914f5248f44b09def2c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20106a23af649dffb3571082e5a9cfdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09f78031a7d18c8f8ddf04bffd1871.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca717c6a55e786238e64f7ebd69b9b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43de850d8546d0933b37846a84f90bc5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76be59eef5f019579f1f5b936b98b72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41212f1139ba1b062d7f40ec7120a9bf.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12f339b0f68f0739fdfcb39ec4f7eb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10732f3fb10019cb15c3c46d118f7da5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3eb5935678e432e6f1f3180bfdb3175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f19c9afadbf80e1e6b5b3a673e6270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fcec7af3520884b173b29bda6c657a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fcec7af3520884b173b29bda6c657a.png)
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2023-07-17更新
|
551次组卷
|
5卷引用:北京市顺义区2022-2023学年高一下学期期末质量监测数学试题
北京市顺义区2022-2023学年高一下学期期末质量监测数学试题重庆市南开中学校2023-2024学年高一上学期开学考试数学试题(已下线)难关必刷01集合的综合问题(3种题型40题专项训练)-【满分全攻略】(人教A版2019必修第一册)(已下线)第三章 函数的概念与性质-【优化数学】单元测试能力卷(人教A版2019)(已下线)专题03 函数的概念与性质3-2024年高一数学寒假作业单元合订本
10 . 已知函数f(x)=
.
(1)求f(2)+f
的值;
(2)求证:f(x)+f
是定值;
(3)求2f(1)+f(2)+f
+f(3)+f
+…+f(9)+f
+f(10)+f
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f51839e695516592969698d7e36a571.png)
(1)求f(2)+f
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218a9f9ee5fe21c0c29bc598179b13fe.png)
(2)求证:f(x)+f
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d11e39cab237f7ecf3147df1ce5d26ba.png)
(3)求2f(1)+f(2)+f
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218a9f9ee5fe21c0c29bc598179b13fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141ad6bf6a2eb28d586851954220dc8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104fb323bc0cce956a81088909f52fae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/995a68230f7ac34d65b89350b6069a7d.png)
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