名校
解题方法
1 . 设
是等比数列,公比大于0,
是等差数列,.已知
,
,
,
.
(1)求
和
的通项公式:
(2)设数列
满足
,
,其中
,求数列
的前n项和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9990d2b1f1099520a70eb90bc2446510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78051a32ad7947e021dc91faee48549d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b9101909b4c87f73e3e8b3bcd5aca9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd08da087d2a650ea2b51d92e656a67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d7a9dfd15bd51c3260902ab9644174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cad52924df9291d5d191d18e09374ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6989caaa907fc3da74b6bfd25d9737e.png)
您最近一年使用:0次
2021-04-01更新
|
1501次组卷
|
3卷引用:上海市外国语大学附属大境中学2021-2022学年高二上学期12月月考数学试题
2 . 已知数列
的通项公式为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0468eec40a6f3f0f2162d21ac0e754.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1669e818b5e056ecbbd73226b6974959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0468eec40a6f3f0f2162d21ac0e754.png)
您最近一年使用:0次
3 . 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
4 . 已知数列
的前
项和为
,且
,若数列
收敛于常数
,则首项
的取值为_____
![](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/10e1cbd6ad5a75c5e8ca27fbff29c87f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fa57d92d6ad44d6a0cafad1e71ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
您最近一年使用:0次
名校
5 . 无穷等比数列的前
项和
,则该数列所有项的和为___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b45e70e002f003436b1d3579767b15c.png)
您最近一年使用:0次
名校
解题方法
6 . 对于一组向量
,
,
,…,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5d8979b38c59bf578ac42b8ff828fd.png)
,令
,如果存在
,使得
,那么称
是该向量组的“
向量”.
(1)设
,若
是向量组
,
,
的“
向量”,求实数
的取值范围;
(2)若
,向量组
,
,
,…,
是否存在“
向量”?给出你的结论并说明理由;
(3)已知
、
、
均是向量组
,
,
的“
向量”,其中
,
.设在平面直角坐标系中有一点列
,
,
…
满足:
为坐标原点,
为
的位置向量的终点,且
与
关于点
对称,
与
关于点
对称,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cfb8c8707c3960bf1fd46b805e481d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a68c67f815a331e77e2d2803cf6bbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82dc7540c4cdee4c34a9311c79b35d95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5d8979b38c59bf578ac42b8ff828fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e19d174b56089b02e0bc307dc024c35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13eee97ef35e938aafc1b41ecb3a4d18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5e2edb48460ee53b58c520fdb1380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0637cdb1d645028b286e4e274f2358bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7408c80684a7ed78f1d3af5ed249c4c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b05df89f6fbdc4255a634b2ffa6bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb6823d280520da116cf1bc3943cf42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cfb8c8707c3960bf1fd46b805e481d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a68c67f815a331e77e2d2803cf6bbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82dc7540c4cdee4c34a9311c79b35d95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f515492171a791777ce122273ff28c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cfb8c8707c3960bf1fd46b805e481d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a68c67f815a331e77e2d2803cf6bbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82dc7540c4cdee4c34a9311c79b35d95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5d8979b38c59bf578ac42b8ff828fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cfb8c8707c3960bf1fd46b805e481d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a68c67f815a331e77e2d2803cf6bbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82dc7540c4cdee4c34a9311c79b35d95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cfb8c8707c3960bf1fd46b805e481d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a68c67f815a331e77e2d2803cf6bbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82dc7540c4cdee4c34a9311c79b35d95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70607e01d10193a1768d8c512380e79a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d8dba9db4965646d1d423507e971661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a86380a6d6501f6504dcb4aa5e3099f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae863e7a1f1fed09f1075de4a817c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f52b152eaf63415b10ed786a58a2747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15520cf5be7c2685975aac51bc99ac4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a86380a6d6501f6504dcb4aa5e3099f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae863e7a1f1fed09f1075de4a817c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb6823d280520da116cf1bc3943cf42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7843d969caba71440ae78d963d89aa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b19a6485af6c3f7a9c5a7f21d417241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a86380a6d6501f6504dcb4aa5e3099f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ba716de9a987b867537febd4d2e338.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1388e5e0e9573d6de0a88c10a5abe116.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae863e7a1f1fed09f1075de4a817c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/326519ed00b6190a806eacb9eafcbc76.png)
您最近一年使用:0次
2021-03-07更新
|
756次组卷
|
3卷引用:上海外国语大学附属外国语学校2022届高三上学期10月月考数学试题
名校
解题方法
7 . 已知数列
是公差不为0的等差数列,
,数列
是等比数列,且
,
,
,数列
的前n项和为
.
(1)求数列
的通项公式;
(2)设
,求
的前n项和
;
(3)若
对
恒成立,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f4e1236d7dc0366d9523d0cbb426be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aaee408bdec05bbdfcd4b841a331e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb48207e371cd9a64a26c5d29f7676e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d30e94689c4871fc03262535d4298d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6041242cf842d7a5cb001ef99ea61aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eab2178710154825426f2a5853dbb2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1933b7c3ace69622339353431c519b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06430886275f5ad62bcda62fce691e99.png)
您最近一年使用:0次
2021-01-11更新
|
1062次组卷
|
9卷引用:上海市南模中学2017届高三上学期9月初态考试数学试题
上海市南模中学2017届高三上学期9月初态考试数学试题2015届上海市青浦区高三上学期期终学习质量调研数学试卷上海市四校(闵行外国语学校、莘庄中学、嘉定二中、朱家角中学)2019-2020学年高三上学期期中数学试题江苏省扬州市新华中学2020-2021学年高二上学期10月阶段性测试数学试题(已下线)考向18 数列不等式-备战2022年高考数学一轮复习考点微专题(上海专用)2020届天津市和平区高考二模数学试题天津市滨海新区七校(塘沽一中等)2021届高三一模数学试题(已下线)专题08 数列的通项、求和及综合应用 第一篇 热点、难点突破篇(讲)-2021年高考数学二轮复习讲练测(浙江专用)(已下线)专题08 数列的通项、求和及综合应用(练)--第一篇 热点、难点突破篇-《2022年高考数学二轮复习讲练测(浙江专用)》
名校
解题方法
8 . 等比数列
的首项为
,公比为
,前
项和为
,则当
时,
的最大值与最小值之和为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.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/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5aa055773974eb8f4f4643049a30242.png)
您最近一年使用:0次
2020-12-07更新
|
592次组卷
|
5卷引用:上海市金山中学2020-2021学年高二下学期第一次月考数学试题
上海市金山中学2020-2021学年高二下学期第一次月考数学试题(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)湖南省长沙市一中2017届高三高考模拟试卷(二)数学(文)试题吉林省吉林市吉林第一中学2020-2021学年高二上学期阶段性考试数学试题天津市耀华中学2022-2023学年高二上学期期末数学试题
9 . 已知等差数列
的前
项和为
,
,
为整数,且对任意
都有
.
(1)求
的通项公式;
(2)设
,
(
),求
的前
项和
;
(3)在(2)的条件下,若数列
满足
.是否存在实数
,使得数列
是单调递增数列.若存在,求出
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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac577f987d768e1a115f2747ec0fd6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076e4327aa32177969acf4e2354a2ead.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeeb33f4b2b3c9a5565a11464310ca5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50814226ef825d67bc2baa878a65d769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)在(2)的条件下,若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5b9a7f872f74b0c83ea70e2d3d9c5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
10 . 根据预测,疫情期间,某医院第
天口罩供应量和消耗量分别为
和
(单位:个),其中
,
,第
天末的口罩保有量是前
天的累计供应量与消耗量的差.
(1)求该医院第
天末的口罩保有量;
(2)已知该医院口罩仓库在第
天末的口罩容纳量
(单位:个).设在某天末,口罩保有量达到最大,问该保有量是否超出了此时仓库的口罩容纳量?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/098afe75dd67aa4c2d1f0b6616c4c1ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90cd8ff72704b7644706c6f1c47e47f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f70754be0f92f25ac6adb8de66aaeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(1)求该医院第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
(2)已知该医院口罩仓库在第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a2d04f6e59c711de52627a306564442.png)
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2020-12-04更新
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4卷引用:上海市嘉定区第一中学2020-2021学年高二上学期第一阶段考试数学试题
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