1 . 已知数列
满足:
,
,且
、
、
成等差数列,其中
.
(1)求实数
的值和数列
的通项公式;
(2)若数列
满足等式:
(
),求数列
的前
项和
;
(3)在(2)的条件下,问:是否存在这样的正数
,可以确保恰有5个自然数
使得不等式
成立?若存在,求
的取值范围,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597b184943b710ea49c751c9a35a1707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d93c1ae7b22099a5d4c1c4241e5ca18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.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/66ea229d1ef42b2dd6240b8bdb25b266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)在(2)的条件下,问:是否存在这样的正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05761833424e671481d2c799885f7b3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
您最近一年使用:0次
2019-12-03更新
|
320次组卷
|
2卷引用:上海市普陀区2019-2020学年高三上学期11月调研测试(0.5模)数学试题
名校
2 . 已知函数
定义在区间
上,
,且当
时,恒有
,又数列
满足
,
,设
,对于任意的
,
的最小自然数
的值为_______________________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455ba3d3e46977fcbe5b71f8bb9df4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1947266214c98cfdeea15425a47de17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c75a15990fdcf1de0a9ac9f475e3c92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4bf92155f517ac547552711d7e1804d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/df49f07a4e2a6dfe4dca3763364f762c.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)
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3 . 已知数列
的前
项和公式为
,若
,
,则数列
的前
项和
( )
![](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/4300dca231e2f4b37f70900b33439d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e191086446263b7bbbd93613577c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.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/7978d7bd6f6caf9ac9837ffce5f89654.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
4 . 设
是等比数列,
是
的前
项和,对任意正整数,有
,又
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d3a5fbf2b402baa22a7adcdc072c18.png)
______ .
![](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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe1f6a264fb4bd20b0ae605a1e3fffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d3a5fbf2b402baa22a7adcdc072c18.png)
您最近一年使用:0次
5 . 贺先生想向银行贷款买辆新能源车,银行可以贷给贺先生N元,一年后需要一次性还1.02N元.
(1)贺先生发现一个投资理财方案:每个月月初投资
元,共投资一年,每月的月收益率达到1%,于是贺先生决定贷款12
元,按投资方案投资,求
的值,使得贺先生用最终投所得的钱还清贷款后,还有120000的余额去旅游(精确到0.01元);
(2)贺先生又发现一个投资方案:第
个月月初投资
元
共投资一年,每月的月收益率达到1%,则贺先生应贷款多少,使得用最终投资所得的钱还清后,还有120000的余额去旅游(精确到0.01元).
(参考数据
,
,
)
(1)贺先生发现一个投资理财方案:每个月月初投资
![](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/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)贺先生又发现一个投资方案:第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce89b633e5d6bcf9406e3f9208fe06d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6b2296cf365a0a781f92c6228d42903.png)
(参考数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee5b2af442c53868a4aebca3b4de9f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2d401d7a0b3927907fc674dce78f721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5db1e2fc4e79b098e5623e843e21833.png)
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名校
6 . 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:上海市七宝中学2018-2019学年高二下学期3月月考数学试题
7 . 从数列
中取出部分项组成的数列称为数列
的“子数列”.
(1)若等差数列
的公差
,其子数列
恰为等比数列,其中
,
,
,求
;
(2)若
,
,判断数列
是否为
的“子数列”,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(1)若等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812be9806122241c476ba1db516c4823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec07a126ada2c921c5b4337f77854cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eaa992a449b828df0ff545e233b279b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f84f592310f4b9637b225cab622b2aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d438131add92b51c4e0b06ec6aff581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373ecb5531c1593f13a0ed081597b3cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9d38a1171131b1a1f3f70ca2117be1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/221016d4bfafd5693a4e767fcf6a2559.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2019-11-14更新
|
370次组卷
|
3卷引用:上海市七宝中学2018-2019学年高二下学期3月月考数学试题
上海市七宝中学2018-2019学年高二下学期3月月考数学试题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(已下线)4.2 等比数列的前n项和(第2课时)(作业)(夯实基础+能力提升)-【教材配套课件+作业】2022-2023学年高二数学精品教学课件(沪教版2020选择性必修第一册)
名校
8 . 在直角坐标平面中,已知点
,
,
,…,
,其中
是正整数.对平面上任一点
,记
为
关于点
的对称点,
为
关于点
的对称点,…,
为
关于点
的对称点.
(1)求向量
的坐标;
(2)对任意偶数
,用
表示向量
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c0c770ededa07b186fd5c34eb16ed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7eee1f9841ba418a99f4af12c62b58b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d806aaaf18d476faa01496db5644e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6ac9df5d8ffede03ef0d21c32a88e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7356ec98b600ece41f3a6b4bc26a7d59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ea50db79b18d8700cfa2559ff5e2d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
(1)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12787674cf0f0e71eec9ac3d1727fda4.png)
(2)对任意偶数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dc801f5007dec6cf5183bfd3051fb02.png)
您最近一年使用:0次
2019-11-13更新
|
224次组卷
|
2卷引用:上海市上海师范大学附属中学2019-2020学年高二上学期9月滚动(1)数学试题
名校
9 . 已知函数
(
),数列
满足
,
,数列
满足
.
(1)求证:数列
是等差数列;
(2)设数列
满足
(
),且
中任意连续三项均能构成一个三角形的三边长,求
的取值范围;
(3)设数列
满足
(
),求
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943633e754a14cc8d306c018f69a8666.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a36699d1f70edf3ecd93272ed54671f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7db3af310880412799ccf668a4a3054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88d48868b259993d0000b7c47525ebcb.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ad5c0d01faee65c56734f7ea4f8ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc329b32ecf0f0532d09a8a21343e8cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b986e3613290b456532843d5ad4c6e67.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d813f3ca8db41a4db6c18eac30fef98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7a4c9ccf19ddb6032bc84c4f5e4e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad52924df9291d5d191d18e09374ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d813f3ca8db41a4db6c18eac30fef98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
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名校
10 . 对于正三角形
,挖去以三边中点为顶点的小正三角形,得到一个新的图形,这样的过程称为一次“镂空操作“,设
是一个边长为1的正三角形,第一次“镂空操作”后得到图1,对剩下的3个小正三角形各进行一次“镂空操作”后得到图2,对剩下的小三角形重复进行上述操作,设
是第
次挖去的小三角形面积之和(如
是第1次挖去的中间小三角形面积,
是第2次挖去的三个小三角形面积之和),
是前
次挖去的所有三角形的面积之和,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/5510ef35-81db-4ad2-9234-53705b945d2b.png?resizew=465)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6eb2fcf76cd58f6573a059ab1ab48b4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/5510ef35-81db-4ad2-9234-53705b945d2b.png?resizew=465)
A.![]() | B.![]() | C.![]() | D.![]() |
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4卷引用:上海市行知中学2020-2021学年高二上学期10月月考数学试题
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