1 . 已知数列
,
满足
,数列
前
项和为
.
(1)若数列
是首项为正数,公比为
的等比数列.
①求证:数列
为等比数列;
②若
对任意
恒成立,求
的值;
(2)已知
为递增数列,即
.若对任意
,数列
中都存在一项
使得
,求证:数列
为等差数列.
![](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/e5653b60d16ec4e653518f0562680250.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(1)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1cf411c8f75433d8a9c5a817d02cf8.png)
①求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6cf53bc5e0e0584c94e96237ca15d97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd0aa56203b4d4549eae8b9657e4ec8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/681ae1522a36768618f7ddaf74abbb7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe8b68b37fb23cc994445ceede28150c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
名校
解题方法
2 . 已知数列
的首项
,且
,
.
(
)证明数列
是等比数列并求数列
的通项公式.
(
)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853eace02560e7f1490694276c29a856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48aac05ba23217b211cfb265543af298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ad4897a05a6a26b10e2d8379137fa1.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414656636a840bbb9a031d6103239fdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf1dd038a36c7dfed064ef8d389871f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b28ef6f1b2279af482557a8ea46f2e43.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9880952857950577055578875ab29141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ba52f89159b5c2eea55eb25c0973a28.png)
您最近一年使用:0次
2018-06-29更新
|
493次组卷
|
2卷引用:【全国百强校】陕西省西安中学实验班2016-2017学年高一下学期期末数学试题
解题方法
3 . 函数
满足:对任意
,都有
,且
,数列
满足
.
(1)求数列
的通项公式;
(2)令
,
,记
.问:是否存在正整数
,使得当
时,不等式
恒成立?若存在,写出一个满足条件的
;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82c70c1c83ca7cfd56db46b3647889bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80a5c8b695a7ced5c4178abb5ebe495d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896df31f80127adbae738b3a014bd4e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065054f4e163585d630aa42cb6323a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5863a45913b95c0a26f922bbfe41ad2.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065054f4e163585d630aa42cb6323a3e.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd51a54ec3b73b903f780c68dc714b98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33814e4449e1a718a6adc4670f653711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/513971773c0b2a4bc35bae94467a0f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564265ae553c03b3cd9f53cdb161e4e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4869dcca30f2d70bb6142deff1269321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2016-12-05更新
|
791次组卷
|
4卷引用:2015-2016学年四川成都外国语学校高一下期末数学理试卷
2015-2016学年四川成都外国语学校高一下期末数学理试卷2016-2017年辽宁盘锦高级中学高二理10月月考数学试卷全国高中数学联赛模拟试题(十)(已下线)专题06 数列在高考中的考法(难点,十一大题型+过关检测专训)-2023-2024学年高二数学《重难点题型·高分突破》(人教A版2019选择性必修第二册)
4 . 已知数列
满足
(
,且
是递减数列,
是递增数列,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cefaffa74c4d4bbc1e76eafbf7811b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88db3e5330f346d07743f780a0e3d899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf33b2a94eae16760d746f9b4b8dbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8194a62bc60a9da9b5cf76f9dc0fa09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a16e2c9ff70b35b0cf6c87d08c4160c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-03更新
|
848次组卷
|
3卷引用:2014-2015学年江西省南昌市二中高一下学期期末考试数学试卷
名校
5 . 设等比数列
的公比为
,前
项和
.
(1)求
的取值范围;
(2)设
,记
的前
项和为
,试比较
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2ba5615f8e90918d1f6e4eeed0ee95.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db01f7e440d5041026c3b3820d25e397.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2017-11-07更新
|
955次组卷
|
5卷引用:人教A版 成长计划 必修5 第二章数列 2.5 等比数列的前n项和
6 . 数列
满足
,
.
(1)证明:数列
是等差数列;
(2)设
,数列
的前
项和为
,对任意的
,
,
恒成立,求正数
的取值范围.
![](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/ce8cf00abb14d4ef5781241bcfe1c762.png)
(1)证明:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea14512be507d0de6d22f55be7421a40.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75e42c15f7a7895aaeae4ce83a3decd3.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d5ec9ad92f37e64eccce922ab1b14e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6af2f597ea3f4dcfb89acb19a4ea6355.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a776f69f59923e7d05b1add774837733.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
7 . 对于正整数
,设
,如
,对于正整数
,当
时,设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0282d82244cedc5af367e10e6f7bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d1ac525f5b8b3845eac4bd66c121ca.png)
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814c946722fed7ef2d1f956469e40a92.png)
__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/054a6c89e3cdb61d810f277c808995af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bda188077936e0629aca2bcc86790ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fda11f235233abc0bcef86d75f52581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe18ddd1d99ac7f0a2224bb7c42b8ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0282d82244cedc5af367e10e6f7bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d1ac525f5b8b3845eac4bd66c121ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b84971719229c85609a446f4904c8c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814c946722fed7ef2d1f956469e40a92.png)
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名校
8 . 已知数列
的前
项和
满足:
(
为常数,且
,
).
(1)求
的通项公式;
(2)设
,若数列
为等比数列,求
的值;
(3)在满足条件(2)的情形下,设
,数列
的前
项和为
,若不等式
对任意的
恒成立,求实数
的取值范围.
![](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/95a966ff380354a3ee8a35c9c2618161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/960728f9d01988e099c3cff6bab076e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/301dd9f9a4fa231560c8bd67b6e5b775.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c252bf4d0af9a612f6649a643d9c0ca3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)在满足条件(2)的情形下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d1e1f73432895c2807ee3d829c7ca30.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95ddbae2be6b01707ffa355089d59c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5235e9027fd05f69f760241e8f08a13c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2016-12-04更新
|
1164次组卷
|
4卷引用:黑龙江省齐齐哈尔市实验中学2019-2020学年高一下学期期中考试数学试题
名校
解题方法
9 . 已知数列{an}的前n项和Sn满足Sn=2an-n.
(1)求数列{an}的通项公式;
(2)设
,记数列{bn}的前n项和为Tn,证明:
(1)求数列{an}的通项公式;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c9dc190d0856e27a1cc225f766808e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc35cadd404e73a7c95cc49d417139cf.png)
您最近一年使用:0次
2016-12-04更新
|
916次组卷
|
4卷引用:2015-2016学年辽宁沈阳二中高一下学期期末数学试卷
10 . 已知数列
和
满足:
,
,
,其中
为实数,
为正整数.
(Ⅰ)证明:对任意的实数
,数列
不是等比数列;
(Ⅱ)证明:当
时,数列
是等比数列;
(Ⅲ)设
为数列
的前
项和,是否存在实数
,使得对任意正整数
,都有
?若存在,求
的取值范围;若不存在,说明理由.
![](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/47769ca08edfa79fc200b9f37d197335.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd6a8f0d0c78bacfb7bc0e166d20158b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d65220e3da8e363042fe1468ea600af9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(Ⅰ)证明:对任意的实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅱ)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc3c95b5fb6a85cd4275acb23e8a8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(Ⅲ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.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/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f740d370ffa09a06354f981b7fe7881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2016-11-30更新
|
1252次组卷
|
3卷引用:2010-2011学年北京师大附中高一下学期期中考试数学
(已下线)2010-2011学年北京师大附中高一下学期期中考试数学沪教版(上海) 高二第一学期 新高考辅导与训练 第7章 数列与数学归纳法 7.3(4)等比数列的求和公式的应用2008年普通高等学校招生考试数学(文)试题(湖北卷)