1 . 设数列
的前n项和为
,已知
,
,
,若
,则正整数k的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c840b24a1626f247eefe7371c8abb50e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2889dd3096379db5dfdd51305bdbb743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2bba93ea41b19a10e9c791029f254c4.png)
A.2016 | B.2017 | C.2018 | D.2019 |
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2021高一·上海·专题练习
2 . 求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b20679653e18d81141dcea23076ce6aa.png)
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2021-09-25更新
|
227次组卷
|
6卷引用:第11讲 三角不等式及其应用-【A+课堂】2021-2022学年高一数学同步精讲精练(沪教版2020必修第一册)
(已下线)第11讲 三角不等式及其应用-【A+课堂】2021-2022学年高一数学同步精讲精练(沪教版2020必修第一册)沪教版(2020) 必修第一册 堂堂清 第二章 2.3(3)基本不等式及其应用高中数学解题兵法 第六十九讲 构造法(已下线)2.3 三角不等式(第3课时)(2)(已下线)2.3 基本不等式及其应用(分层练习)-高一数学同步精品课堂(沪教版2020必修第一册)(已下线)专题15 盘点构造函数能解决的六种问题-1
名校
3 . 已知函数
.
(1)若函数
的解集为
,求函数
的解集;
(2)若
,
,
,试证明:对于任意
,有
;
(3)若
时,有
,求证:当
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d7ed6f4b0e08cd887d2fdc2a5e37e4.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd089f65fb0afc3e31275ca01bd158d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008da60eb4dd38b35c5799fd5f7e0e97.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c8cef5386fbe3367564f9ebbc811cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897f9f5f44fe210d22abe4cbe719847d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de87cccecadfae19f11358010521f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a6bea084567e3055f0e58499398a46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0950253f473515ab175867f8fc5b5a.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a6bea084567e3055f0e58499398a46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366839b25310cb3168d411b1d5f73b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a6bea084567e3055f0e58499398a46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d781166b65da7a054727f5503591e984.png)
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4 . 函数
在
上有定义,
,且对任意不同的
都有
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/304226ca50149b49702928e44d565964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2d0c9d13770863f59ea9fa45488de63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3392be8e28f1956a66d64c10f729a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cee0e67d54bf6a6bf27780f5a19a02b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a439ea200ee01f65eb0105407d5d6390.png)
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解题方法
5 . 已知M是满足下列性质的所有函数
组成的集合:对任何
(其中
为函数
的定义域),均有
成立.
(1)已知函数
,判断
与集合M的关系,并说明理由;
(2)是否存在实数a,使得
属于集合M?若存在,求a的取值范围,若不存在,请说明理由;
(3)对于实数
,用
表示集合M中定义域为区间
的函数的集合,定义:已知
是定义在
上的函数,如果存在常数
,对区间
的任意划分:
,和式
恒成立,则称
为
上的“绝对差有界函数”,其中常数T称为
的“绝对差上界”,T的最小值称为
的“绝对差上确界”,符号
.求证:集合
中的函数
是“绝对差有界函数”,并求
的“绝对差上确界”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03e6ac25d3f66b036bee546b28296e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b5886cf72ed5a1073263eb9ff485c7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/977a7e54c62dc0953cb298dabbf4860a.png)
(1)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e259b881edb5c3689559ea363488f9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)是否存在实数a,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e5ea5fddf06ac678b1aed55349999e.png)
(3)对于实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa38149578f22f9e1e2bd481dade72de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79775b36e40e07114c57a801e713398d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627565d32e529cafcd2744d006ec6de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/094f977194228bed828f3507f5898934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627565d32e529cafcd2744d006ec6de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682de988a497e81d10d70f8740f73a93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92cbcd6191ec6ebf0020943f65d88f27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627565d32e529cafcd2744d006ec6de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d434e054594e2a29b97888f716c63f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f7b099591432a0a71180d1a3141de58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
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