名校
解题方法
1 . 等差数列
的前n项和为
,当首项
和公差d变化时,
是一个定值,则下列选项中为定值的是( )
![](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/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82aebc6940e2fa438a3a14cb3aae8b7e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-01-16更新
|
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5卷引用:河南省信阳高级中学2023届高三下学期二轮复习滚动测试2理科数学试题
解题方法
2 . 已知各项均为正数且单调递减的等比数列
满足
,
,
成等差数列.其前
项和为
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55fb3dd5b3c0d098ad8cce5de1e604f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8afb5276cccd088ed7cada99858bff.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/2ca2bc66177a1479e24eeaa63b18ba5b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-12-04更新
|
946次组卷
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3卷引用:河南省重点中学新课标卷2021-2022学年高三上学期调研考试理科数学试题
名校
3 . 在等差数列
中,已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba23f3b952079cd3b021679cc743537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0d4c35d9b8f32883a0ba64ac61dfcf.png)
A.4 | B.6 | C.8 | D.10 |
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2021-01-09更新
|
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|
7卷引用:河南省温县第一高级中学2021-2022学年高三下学期2月月考理科数学试题
4 . 已知数列
是递增的等差数列,且
,
.
(1)求
的通项公式;
(2)求正整数
,使得
.
![](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/48ea76b9fccb6465ec0b8ea54b68dfc2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)求正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b813ad44431d0e4e3a954a71f847484.png)
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2020-12-20更新
|
226次组卷
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2卷引用:河南省十所名校2020-2021学年高三上学期第二次考试数学(文)试题
解题方法
5 . 设数列
的前
项和为
,且
,
.数列
满足
,
.
(Ⅰ)求
的通项公式.
(Ⅱ)是否存在正整数
,
,使得
,
,
成等差数列?若存在,求出
,
的值;若不存在,请说明理由.
![](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/d925d79d473bed249fd2755699995a10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da93b8e1ea6b7256f293039f5e317d84.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/ae3d6a3cf05e01779c40baf945312230.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅱ)是否存在正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514037601f6516157460b728c12415a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13423c094861baf4b759b7f3d8c3c226.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f64696f60c533ad95dc7890eb902741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/233427826eb2233641fc3a9805f6d206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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2020-12-20更新
|
239次组卷
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2卷引用:河南省十所名校2020-2021学年高三上学期第二次考试数学(文)试题
6 . 已知数列
是单调递增的等比数列,其前
项和为
,且满足:
,
是
,
的等差中项.
(1)求数列
的通项公式及
;
(2)记
,求数列
的前
项和
.
![](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/b27746aa6f3e839b2bf0401347cae0f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/978e2f7118d2bd305086ae03cc7dd683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1147f12f81fc7cf50ce0d460f69461.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)
您最近一年使用:0次
名校
解题方法
7 . 已知数列
是等比数列,若
,且
,
,
成等差数列.
(1)求
的通项公式;
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ef35b21da4cd8130642539d8245f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8fb208e34ff599cadaae190ae42eb91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ae0d653ff399fb3ed93e5f9573ce1ae.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/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
2020-09-22更新
|
369次组卷
|
3卷引用:河南省中原名校联盟2020-2021学年高三上学期第一次质量考评数学(理科)试题
8 . 已知等比数列
的公比为
,前
项和为
,若
,
,
成等差数列,则
( )
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f30f56664446f32dbbc2c5f12a99374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f52ab6a9d47d0d34d14b2399c6c4ccf.png)
A.![]() | B.1 | C.![]() | D.2 |
您最近一年使用:0次
2020-09-22更新
|
763次组卷
|
5卷引用:河南省中原名校联盟2020-2021学年高三上学期第一次质量考评数学(文科)试题
名校
9 . 正项等比数列
中,
,且
与
的等差中项为2,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/904205b4e0d2b28e3b7889cab029d578.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fd71bc7e6668f90f259ad0b06dd60c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-08-31更新
|
1077次组卷
|
6卷引用:河南省名校联盟2020届高三下学期6月联考数学(理科)试题
河南省名校联盟2020届高三下学期6月联考数学(理科)试题河南省南阳市第一中学校2020-2021学年上学期高三第五次考试理科数学试题河南省名校联盟2020届高三(6月份)高考数学(理科)联考试题江苏省徐州市邳州明德实验学校2020-2021学年高二上学期10月月考数学试题安徽省滁州市定远县育才学校2021届高三下学期开学考试数学(理)试题(已下线)第02章数列(B卷提升篇)-2020-2021学年高二数学必修五同步单元AB卷(人教A版,浙江专用)
名校
10 . 正项等比数列
中,
,且
与
的等差中项为
,则
的公比是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22af2195b260dcce7bb6b2a75287940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc858b7a95c5006a44067022da09f667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2020-11-10更新
|
297次组卷
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12卷引用:2020届河南省南阳市第一中学高三第十次考试数学(理)试题
2020届河南省南阳市第一中学高三第十次考试数学(理)试题2020届河南省三门峡市高三上学期第一次大练习(期末)数学(文)试题【市级联考】山西省2019届高三3月高考考前适应性测试数学(文)试题(已下线)2019年4月15日 《每日一题》理数三轮复习-数列(1)(已下线)2019年4月15日 《每日一题》文数三轮复习-数列(1)2019届湖南省岳阳市第一中学高三第二次模拟数学(理)试题(已下线)专题6.3 等比数列及其前n项和-2021年高考数学(理)一轮复习-题型全归纳与高效训练突破(已下线)专题6.3 等比数列及其前n项和-2021年高考数学(文)一轮复习-题型全归纳与高效训练突破(已下线)专题6.3 等比数列及其前n项和(精练)-2021年高考数学(理)一轮复习学与练浙江省温州市环大罗山联盟2018-2019学年高一下学期期中联考数学试题人教B版(2019) 选修第三册 一举夺魁 第五章 5.3.1 等比数列(已下线)第4讲 等比数列的通项及性质5大题型总结(2)