解题方法
1 . 已知数列
满足:
,
.
(Ⅰ)证明:数列
为等比数列,并求数列
的通项公式;
(Ⅱ)记
,求使
成立的最大正整数n的值.(其中,符号
表示不超过x的最大整数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2438f2272d7b7ab51dbbe587025a553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5af8e317162f3c1bb3483b08207ea13.png)
(Ⅰ)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213e22890204937a5dded4436369390f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅱ)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b484a6f707521fb604b8139753d2a6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeed2dd4e7c90200f05009bd071b3801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
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2021-03-02更新
|
2043次组卷
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7卷引用:浙江省名校协作体2021届高三下学期联考数学试题
浙江省名校协作体2021届高三下学期联考数学试题(已下线)专题20 数列综合-2020年高考数学母题题源全揭秘(浙江专版)(已下线)【新东方】高中数学20210429—010【2021】【高三下】(已下线)精做02 数列-备战2021年高考数学(文)大题精做(已下线)精做02 数列-备战2021年高考数学(理)大题精做(已下线)专题4.3 等比数列-2020-2021学年高二数学同步培优专练(人教A版2019选择性必修第二册)(已下线)第17节 等比数列及前n项和
2 . 已知数列
中,
,
,记
为其前
项和.数列
的各项均不为0,且对任意
,
.
(Ⅰ)证明:数列
是等比数列;
(Ⅱ)(ⅰ)证明:
;
(ⅱ)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb018686bbde47e76a4a1388d4e1fad5.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/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c684f66be7dbde8f829bc8d32a2323.png)
(Ⅰ)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec4bdc2a6d4fc387dc621f0b5a268c5.png)
(Ⅱ)(ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5d8a52cb8e8de4e83abd8bb88240e8.png)
(ⅱ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1363ea088f5c49694c20557b5df3b81e.png)
您最近一年使用:0次
3 . 已知数列
的前n项和为
,且满足
,
.
(1)求
的通项公式
(2)数列
满足
,
,求
的通项公式.
![](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/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52b6848b1de2b5080902667f6aedb9f0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa54c6b88c2bfb27fda1d179b3b0f43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39c08b7d20094b7b16144dc329ee0682.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
4 . 设等差数列
的前
项和为
,
.数列
的前
项和为
,
,
.
(1)求数列
,
的通项公式;
(2)记
,数列
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/4111624801603d9d57121c077e6579d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/461b8862f29e866355ab9ef237e1cea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1862df2546cf4fc980f41b5f4f759cb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c88a7ef007c78a93e33bd77c4396626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd6a506c0a4d15847ac3fc88437908a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ebf51d84bd2c86a8fc3017e1d7322b.png)
您最近一年使用:0次
5 . 设
是数列
的前
项和,且
是
和2的等差中项.
(1)求数列
的通项公式;
(2)记
.
①求数列
的前
项和
;
②设
,求证:
.
![](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/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/680b2b77627feae49358206f0fed1134.png)
①求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc01cb2744683d07c17eaa8155f408ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
②设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff4a26114132707077462a200be8557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce61806b45006520f999a1255c440ff6.png)
您最近一年使用:0次
2020-04-14更新
|
528次组卷
|
4卷引用:浙江省十校联盟2019-2020学年高三下学期寒假返校考试数学试题
浙江省十校联盟2019-2020学年高三下学期寒假返校考试数学试题(已下线)专题15 数列与不等式(解答题)-冲刺2020高考跳出题海之高三数学模拟试题精中选萃(浙江专版)1号卷·A10联盟2022届全国高考第一轮总复习试卷数学(理科)试题(十)天津市武清区杨村第一中学2023-2024学年高三下学期第二次热身练数学试题
解题方法
6 . 已知数列
满足
,其中
为
的前
项和.
(1)求
,
,
的值;
(2)求证:
是等比数列;
(3)证明:对任意
,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2b33e12d2445137e26cd263635604f5.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)
(1)求
![](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)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ebd8e5acf5e235aeec28af1a4cca56.png)
(3)证明:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbcff4ac05f209a331044747ec792480.png)
您最近一年使用:0次
7 . 已知数列
满足
,
,
,
.
(1)证明:数列
是等比数列;
(2)求数列
的通项公式;
(3)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9652f65b28e2032c0cbc2a9649db4f51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e70b04fb4879fd9b98a103c793414c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ecdd983fbc86b85780272ceaa485213.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460051e994f6e23bd5810a40f7bd21a.png)
您最近一年使用:0次
2020-02-19更新
|
2836次组卷
|
4卷引用:浙江省新高考2020-2021学年高三上学期10月特供卷(四)数学试题
名校
解题方法
8 . 各项为正的数列
满足
,
,
(1)取
,求证:数列
是等比数列,并求其公比;
(2)取
时,令
,记数列
的前
项和为
,数列
的前
项之积为
,求证:对任意正整数
,
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da5b391236b01506c4dd47abce906db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e61bfc07b4b2358d54873333eb771a7c.png)
(1)取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f28f1ce6b52292091648be9d05a33c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ce8770ab24c55480925e6e58d548eea.png)
(2)取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d8f8c99ed4f1fbbb17b36ed96bbcb98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d507e8941dd35283e4d69b15334049ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195431ccf2756a0db26f14b7b91a32a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195431ccf2756a0db26f14b7b91a32a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a425978da20cebf8c4c63953579e7b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf5a40f1c4525820651ac45d37647127.png)
您最近一年使用:0次
2016-12-03更新
|
750次组卷
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5卷引用:【全国百强校】浙江省杭州市学军中学2017届高三上学期第三次月考数学试题