1 . 已知函数
满足当
时,
,当
时,
.若方程
在
上的根从小到大排列恰好构成一个等差数列,则下面的数可能在这个数列中的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04614d0fac9cde995374a43d4323b723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffbd6d46c75b7454cc1259ed8d818ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4318a47d7e83d587e74bab4d3d1f6883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1a37cfdb40ae3ed78d7f49d3e9cd2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce90064385c4633056784c1ae375a2d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bdfed8d6862125dc1fecfce0322a750.png)
A.![]() | B.2020 | C.2021 | D.![]() |
您最近一年使用:0次
2 . 若数列
的前
项和
满足
,等差数列
满足
.
(1)求数列
,
的通项公式;
(2)设
,求数列
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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5195b6d2cea20e163dc12687e3930197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9216acd714dd7ebbb09304dc19149b8f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e887e14d1cd4d9508405ef18da4b50e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.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
2020-10-16更新
|
451次组卷
|
11卷引用:2014届河北省邯郸市高三第一次模拟考试理科数学试卷
(已下线)2014届河北省邯郸市高三第一次模拟考试理科数学试卷2016届河北省邯郸市一中高三下学期研六考试理科数学试卷2015-2016学年河北武邑中学高二下4.17周考理数学卷广东省惠州市崇雅实验学校2017-2018学年高二单元训练(数列)数学试题【全国百强校】黑龙江省哈尔滨师范大学附属中学2019届高三上学期期中考试数学(理)试题江西省宜春市奉新县第一中学2019-2020学年高三上学期第四次月考数学(理)试题海南省海口市琼山中学2020届高三年级第四次月考测试数学试题宁夏银川贺兰县景博中学2020-2021学年高一下学期期末数学试题广东省深圳市福田区外国语高级中学2023届高三上学期第二次调研数学试题广东省普宁市华美实验学校2023届高三上学期第二次月考数学试题广东省梅州市大埔县虎山中学2022-2023学年高三上学期第三次教学质量检测数学试题
解题方法
3 . 已知等比数列
的前
项和为
,且
,若
,则
( )
![](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/699b1ff1f8ee39d34b39581a3da0b9ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0cdc1755f98272fc92a0f18172e9ff3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-05-09更新
|
510次组卷
|
8卷引用:2020届河北省邯郸市高三第一次模拟数学(理)试题
2020届河北省邯郸市高三第一次模拟数学(理)试题2020届陕西省商洛市高三下学期高考模拟测试理科数学试题2020届河北省邢台市五岳联盟高三4月模拟数学(理)试题(已下线)第22练 等比数列-2021年高考数学(文)一轮复习小题必刷2020届黑龙江省高三5月联考数学(理科)试题(已下线)专题10 等比数列-2020年高考数学(文)母题题源解密(全国Ⅰ专版)(已下线)第23练 等比数列-2021年高考数学(理)一轮复习小题必刷(已下线)理科数学-2021年高考考前20天终极冲刺攻略(二)(课标全国卷)
解题方法
4 . 已知数列
满足数列
的前n项和为
.
(1)求数列
的通项公式及前n项和Sn;
(2)若数列
的前n项和为Tn,求Sn﹣8Tn的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e987756fedea2408cd8c8a0672c3f50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9b59be71089402987c1398d4683445f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
您最近一年使用:0次
5 . 已知数列
满足,
,
,则
( )
![](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/83eb0330e4696b03f9dd70f276447a1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39bbf0a641cc462fbed00ff931ac38e6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-06-14更新
|
280次组卷
|
3卷引用:河北省邯郸市部分示范性高中2024届高三下学期三模数学试题
6 . 已知数列
的各项均是正数,其前
项和为
,满足
(
).
(1)求数列
的通项公式;
(2)设
(
),数列
的前
项和为
,求证:
![](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/2ecb512dadf8cb1404adfc7e9b19997b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c3a6bebee9c253d09d09d105084abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43fe57b4138386733f5c0f5b6929a65a.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/c215db1d8f69757118ad405b78035628.png)
您最近一年使用:0次
2016-12-04更新
|
1238次组卷
|
6卷引用:2016届河北省邯郸一中高三下学期第一次模拟文科数学试卷
2016届河北省邯郸一中高三下学期第一次模拟文科数学试卷河北省武邑中学2017届高三下学期第四次模拟考试数学(文)试题2016届河北省正定中学高三上第五次月考理科数学试卷2020届山西省运城市高三上学期期中调研测试数学(理)试题辽宁省沈阳市重点高中协作校2018-2019学年高二下学期期中数学文科试题(已下线)理科数学-2020年高考押题预测卷03(新课标Ⅰ卷)《2020年高考押题预测卷》
名校
7 . 已知数列
,
的前
项和分别为
,
,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abb42647bb48f0ed2087a354719204c.png)
____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf70b7634253be512bfda01d2cceee0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cbec2b89a224681c1a3bd16f0be1fcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abb42647bb48f0ed2087a354719204c.png)
您最近一年使用:0次
2018-03-29更新
|
662次组卷
|
3卷引用:河北省邯郸市2018届高三第一次模拟考试数学(文)试题
8 . 记Sn为等差数列{an}的前n项和,若a1+3a5=12,则S7=( )
A.18 | B.21 | C.24 | D.27 |
您最近一年使用:0次
解题方法
9 . 在数列{an},{bn}中,an=bn+n,bn=﹣an+1.
(1)证明:数列{an+3bn}是等差数列.
(2)求数列
的前n项和Sn.
(1)证明:数列{an+3bn}是等差数列.
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850b7e0864e8bf344da78060de918e85.png)
您最近一年使用:0次
2020-05-16更新
|
249次组卷
|
2卷引用:2020届河北省邯郸市高考一模数学(文)试题
10 . 若存在等比数列
,使得
,则公比
的取值范围为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4528ee1a6ab785b238ab44b0b449fde9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
您最近一年使用:0次