13-14高三下·上海虹口·阶段练习
名校
1 . 已知
,
,求
的最小值.
解法如下:
,
当且仅当
,即
,
时取到等号,
则
的最小值为
.
应用上述解法,求解下列问题:
(1)已知
,
,求
的最小值;
(2)已知
,求
的最小值;
(3)已知正数
,满足
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445dd783a0f731427bde50fea887c1ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e85107c8abd4a977590d7c038ed127a.png)
解法如下:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11abd2c9edc74e429a58fa8988390689.png)
当且仅当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c34bb88b7df81b0a9cc4f5f532f529.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f86c800af77b70d7799500a45f91721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddab9f2cdfbb37f5d5845e7943910624.png)
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e85107c8abd4a977590d7c038ed127a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3755d7e08b98c26303f2f61de7e7ddd2.png)
应用上述解法,求解下列问题:
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af36a3b0f5f36d3e70d5af4b2de6bd44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751e274e9107d780c39ba9c49d6daefb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13ae8c7022f6f486ce3257e0296baf0.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a90dbb3595c370bd76472940830cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e73fdbdcbd094c52f9787d9fbe4f9c6.png)
(3)已知正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d02a8555da4dbbc7820a50a95b071ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da3b2edf826475ee72400c408873facb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97610bfdaa2ae590eb19ff2ba24cbccf.png)
您最近一年使用:0次
2021-03-31更新
|
831次组卷
|
11卷引用:上海市浦东新区川沙中学2018-2019学年高二下学期期末数学试题
上海市浦东新区川沙中学2018-2019学年高二下学期期末数学试题上海市金山中学2016-2017学年高二下学期期末考试数学试题(已下线)2014届上海市虹口区高三5月模拟考试理科数学试卷(已下线)2014届上海市虹口区高三5月模拟考试文科数学试卷上海市建平中学2015届高三下学期4月月考数学试题上海市吴淞中学2023-2024学年高一上学期第一次调研(10月)数学试题江苏省南通市通州高级中学2020-2021学年高一上学期第一次阶段性测试数学试题(已下线)第3章 不等式 单元综合检测(基础过关)(单元培优)-2021-2022学年高一数学课后培优练(苏教版2019必修第一册)(已下线)第2课时 课后 基本不等式(已下线)考点07 章末检测二(不等式)-备战2022年高考数学一轮复习考点一遍过(新高考地区专用)【学科网名师堂】(已下线)第07讲 《不等式》章节检测-备战2023年高考数学一轮复习考点帮(新高考专用)【学科网名师堂】
2 . 函数
满足
,当
时,
恒成立,又
满足:
,
,设
.
(1)在
内求实数
,使得
;
(2)证明:数列
是等比数列,并求
的表达式以及
的值;
(3)是否存在正整数
,使得对任意
,都有
成立,若存在,求出
的最小值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d25529e1f1ee84da70459bf7ffa9ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073bd519f70576bee70a7ec7b7ac38fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f97718f1472e11502eaa775b58bd05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44123f6e47e69997f029956949884b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26bd53dd2cc57cead89f89b46d304a37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31028ee632a33f46f1358714fc992d54.png)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c275d203295b989c129101d82e74ae01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca14ec136e9ac710ea562bc66a05b79d.png)
(2)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4982eefc80c259419147de7ff8e5074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09c2f627b80a0301d0112f4ebb51316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3307cc210d44315380725216d10ff3d2.png)
(3)是否存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aba95f1aacf777532636f8409030f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
3 . 在平面直角坐标系中,函数
在第一象限内的图像如图所示,试做如下操作,把
轴上的区间
等分成
个小区间,在每一个小区间上作一个小矩形,使矩形的右端点落在函数
的图像上.若用
,表示第
个矩形的面积,
表示这
个矩形的面积总和.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/9d236159-b191-4908-8623-a647c6a3c36c.png?resizew=144)
(Ⅰ)求
的表达式;
(Ⅱ)请用数学归纳法证明等式:
;
(Ⅲ)求
的值,并说明
的几何意义.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff65953311c700ffe160fb0d8a1afc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e11f4ca0e7ace69f92130d0525bcdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff65953311c700ffe160fb0d8a1afc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5742a858aae33282f10a20f60a70498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/9d236159-b191-4908-8623-a647c6a3c36c.png?resizew=144)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f255d0395fba51ca2d44293cca42e0a.png)
(Ⅱ)请用数学归纳法证明等式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d890a201846c41fc9935565d0cce73.png)
(Ⅲ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58abe92020722722506c7b12c7879ac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58abe92020722722506c7b12c7879ac5.png)
您最近一年使用:0次
2020-06-03更新
|
283次组卷
|
4卷引用:上海市青浦区2019-2020学年高二上学期期中数学试题
名校
4 . 设数列
的前
项和
,已知
,
.
(1)求证:数列
为等差数列,并求出其通项公式;
(2)设
,又
对一切
恒成立,求实数
的取值范围;
(3)已知
为正整数且
,数列
共有
项,设
,又
,求
的所有可能取值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85955f51864a2ef4adf786e9d192af1.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a813139b92a24e1124ef96e3e485f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7368d871d7a543a82be0758f3ba904d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c972cbd63decec197aec1bdc306de67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5631bc01b998a4b3fabd9e131699dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/effd163f8b1a235eb67227956e3652e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68f8740053b8bcc7c8b4a129436f52d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2019-11-08更新
|
425次组卷
|
4卷引用:上海市嘉定二中2019-2020学年高二上学期10月月考数学试题
名校
5 . 已知在平面直角坐标系中,
,
(
),其中数列
、
都是递增数列.
(1)若
,
,判断直线
与
是否平行;
(2)若数列
、
都是正项等差数列,它们的公差分别为
、
,设四边形
的面积为
(
),求证:
也是等差数列;
(3)若
,
(
),
,记直线
的斜率为
,数列
前8项依次递减,求满足条件的数列
的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42fdaa4763fc6834ed12d4f780c74c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5010b2e9175fdc6fbf5bf88541421d27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff1c33b81ac2f065d37faef37504bb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81496535a302e25c366e3ffa46e0c54b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34876d748f30fa4fc2eb6a686b5ff5.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f2a8097208d996bf69f9b0795b0e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cce224c28ca451c4f105dc3b077736cb.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4b5779873cb3f4366dbfdb983dec81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f8d1dcfab8e4079c100653603acf75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b741df7d2e8cd077989e4e5401c7d1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef3241705cd0b7fae09b96df8b3e9af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374cb268ffa23fc0bf12c6e6dc873c4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbbf4d763f3cbe5a71707bc19c78191.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b311784db139326c27b72a3d55e29c31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
您最近一年使用:0次
名校
6 . 已知数列
的前
项和为
,且
,
(
).
(1)计算
,
,
,
,并求数列
的通项公式;
(2)若数列
满足
,求证:数列
是等比数列;
(3)由数列
的项组成一个新数列
:
,
,
,
,
,设
为数列
的前
项和,试求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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/cdd3a25ac2cde3d2c884028f750cfff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ec94eb50c159d83b95b98259d8e244.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/649bf0cdc22c19309b0fe33946dc2fc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(3)由数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74a45290d1a0d7bef4d09f688e3b9f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3816b82d68dc9e2ac84c5333b6f1d8e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91cb761ca80de0855dd4163246799a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e5531913e2f170465d8df01795cd51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a04e1f89fdb8a3c983179f51868a2337.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db1c0849b21a1801dd16c74bb491b02b.png)
您最近一年使用:0次
2019-10-01更新
|
290次组卷
|
3卷引用:上海市七宝中学2019-2020学年高二9月月考数学试题
7 . 已知函数
(
为常数,
且
),且数列
是首项为
,公差为
的等差数列.
(1)求证:数列
是等比数列;
(2)若
,当
时,求数列
的前
项和
的最小值;
(3)若
,问是否存在实数
,使得
是递增数列?若存在,求出
的范围;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eac51d51a88ce2e93eea87045540659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c525393775354325cbf7839366ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7f37c589447bba4e81b0fa9b7cd15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c8e7f5b61b2249f96161dbd5ce4ac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/286b932a3c77ae8d01ad34100ba7becd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d3b2e146f0407a3353d9d1570ed214d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2019-11-07更新
|
333次组卷
|
5卷引用:上海市宝山区高境一中2018-2019学年高二下学期期中数学试题
上海市宝山区高境一中2018-2019学年高二下学期期中数学试题上海市南洋模范中学2019-2020学年高三上学期9月月考数学试题2016届上海市宝山区高考一模数学试题(已下线)模块二 难点痛点归纳与突破专题1 数列中最值、范围问题【高二人教B版】(已下线)模块二 专题2 数列中最值、范围问题【高二北师大版】
名校
8 . 无穷正实数数列
具有以下性质![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f7a77cac21a51f4c39c7d9ad35dca8.png)
(1)求证:对具有上述性质的任一数列,总能找到一个正整数n使下面不等式恒成立![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e5e8336c9db7517d89c386cb63ef28.png)
(2)寻一个满足上述条件的数列,使下面不等式对任一正整数n均成立
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f7a77cac21a51f4c39c7d9ad35dca8.png)
(1)求证:对具有上述性质的任一数列,总能找到一个正整数n使下面不等式恒成立
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e5e8336c9db7517d89c386cb63ef28.png)
(2)寻一个满足上述条件的数列,使下面不等式对任一正整数n均成立
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2334f49e73b6772fe51d1a9c56f3125.png)
您最近一年使用:0次
名校
9 . 抛物线
的准线与
轴交于点
,过点
作直线
交抛物线于
,
两点.
(1)求直线
的斜率的取值范围;
(2)若线段
的垂直平分线交
轴于
,求证:
;
(3)若直线
的斜率依次为
,
,
,…,
,…,线段
的垂直平分线与
轴的交点依次为
,
,
,…,
,…,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9770705ca8082abae048bd82268c1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032cbcdf609154bf27c55482d47b9ecd.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca8b26c3ad6d892590290a2304126bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c6af45645ea1b7d1e070113b3260d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7688363f5ffff23a6193c7a8eee501c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5815cc29f60d2aa538c4dd30e0803a4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d1bd9858f86566b43bf41413563416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea30e7a3f7c68487d8bb224909b9455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07476854ec1158f57c3fff69fe9a04a8.png)
您最近一年使用:0次
2019-11-14更新
|
281次组卷
|
3卷引用:上海市闵行区七宝中学2018-2019学年高二下学期开学考试数学试题
解题方法
10 . 已知一非零向量列
满足:
,
.
(1)证明:
是等比数列;
(2)设
是
,
的夹角
,设
,
,
,求
;
(3)设
,问数列
中是否存在最小项?若存在,求出最小值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5a38e5d6578eccec4d2da37de80b885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/087af434bb9df4c28b96fdf0783bd080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb2fc47b9349f86ada0c8b8895e0350.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d16c067abe5852f5fe0ebd2a46b4c552.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92ffa8be5a02790c6161c56b8e90db64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d1899ef8c31d8ff1949a00e75b7228b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f56be493b67953d5800a3e4a3166b4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd048fe3fbd6b0623f146a0ef9021e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3e4c59bfdabb47b0684aad3ecbc1a9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4506abed8b5a14dee3a38ba1fd91b4c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e34f9b09b08b79da1a1c6f724e22614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee51d4aa370f87df9d4b7de015aba10c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
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