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1 . 如图,在△ABC中,D为BC的四等分点,且靠近点B,E,F分别为AC,AD的三等分点,且分别靠近A,D两点,设
=
,
=
.
(1)试用
,
表示
;
(2)证明:B,E,F三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
(1)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d10782e6438dcdda6bd10e2aad31cc.png)
(2)证明:B,E,F三点共线.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/83c60306-f044-4b7e-9a80-2d727a689e41.png?resizew=147)
您最近一年使用:0次
2018-08-22更新
|
1817次组卷
|
5卷引用:湖南省澧县一中高三数学(理)一轮复习《平面向量》单元检测试卷
9-10高一·湖南长沙·单元测试
2 . 数列
首项
,前
项和
与
之间满足
.
(1)求证:数列
是等差数列;并求数列
的通项公式;
(2)设存在正数
,使![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e30b34d3ef33337e769109bcdcc381.png)
对任意
都成立,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de4a643e34e4fe80e2e44d73798bb50e.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad83668ff336589f82a2cd04db9f9947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)设存在正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e30b34d3ef33337e769109bcdcc381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fbcd2d3551aaddbc071957c721ac0d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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11-12高二上·湖南永州·单元测试
3 . 观察:
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d6463138ee02ab51e78b7c223c51d5.png)
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381a83358bfffc4008b3761fbaf69eab.png)
有以上两式成立且有一个从特殊到一般的推广,请写出你的推广并证明.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d6463138ee02ab51e78b7c223c51d5.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/381a83358bfffc4008b3761fbaf69eab.png)
有以上两式成立且有一个从特殊到一般的推广,请写出你的推广并证明.
您最近一年使用:0次
11-12高二上·湖南永州·单元测试
4 . 已知数列
的通项公式
,记
,试通过计算
的值,推测出
的值(不必证明)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba588281b3eeee6fe513f877c3747eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932cb652ca7581806d6a6cb63c64bc2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/772a551ffd74f38bb06f335fa70a85c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4fc8faefb26b233d4aa9dbef043aae.png)
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11-12高二上·湖南永州·单元测试
5 . 如果不全相等的实数
成等差数列,求证:
不可能成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f81b8a02e231884bc36fdc4870830cc.png)
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10-11高二·湖南邵阳·单元测试
6 . 如图,
是以
为直径的
上一点,
于点
,过点
作
的切线,与
的延长线相交于点
是
的中点,连结
并延长与
相交于点
,延长
与
的延长线相交于点
.
![](https://img.xkw.com/dksih/QBM/2013/7/1/1571260473524224/1571260478980096/STEM/6660060ebbe44b04844ffcba1ec31bc0.png)
(1)求证:
;
(2)求证:
是
的切线;
(3)若
,且
的半径长为
,求
和
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17be90850a55d8b037e15d45de2bab0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f7b2fd3cceecfa7cbdf26957c21015b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2013/7/1/1571260473524224/1571260478980096/STEM/6660060ebbe44b04844ffcba1ec31bc0.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193ea44749f1c64c8723e84a57d15cb9.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193ea44749f1c64c8723e84a57d15cb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
您最近一年使用:0次
10-11高二下·云南红河·阶段练习
名校
7 . 已知函数f(x)=ln(x+1)-x.
⑴求函数f(x)的单调递减区间;
⑵若
,证明:
.
⑴求函数f(x)的单调递减区间;
⑵若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc3e5be1796493161a4df7e28a6f6b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0cf3703d9267731e5e22e070edf696.png)
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