名校
解题方法
1 . 已知数列
的前
项和为
,
,当
时,
.
(1)求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682db68b19bbb77527d6d3e0f2a17322.png)
(2)设
,求数列
的前
项和为
.
![](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/0ea8d0e50065114b05ef2dc1ea1129cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01f8c91bc637c17210a11782b1e50116.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682db68b19bbb77527d6d3e0f2a17322.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f6610d31f0d82f72157c30d2cfa20ed.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)
您最近一年使用:0次
2023-02-14更新
|
2071次组卷
|
7卷引用:湖南省怀化市长沙市长郡中学等3校2023届高三上学期开学考试数学试题
解题方法
2 . 已知数列
为等比数列,其前n项的和为
.已知
,且
成等差数列.
(1)求数列
的通项公式;
(2)已知
,记
,若
对于
恒成立,求实数m的范围.
![](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/a341b761ce39128b0437f5be82fe79ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4792f3e2200a29f110dbc3eb85b9d962.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40c1d02f1704af6b6ff4095ee3bae3de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a487d65373ea1391d19c9e86c94490ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fad77e1c6c928f84a19e3f11c8923db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
您最近一年使用:0次
名校
解题方法
3 . 已知数列
的前
项和为
,且
.
(1)求数列
的通项公式;
(2)记集合
,
,若
中有3个元素,求
的取值范围;
(3)是否存在等差数列
,使得
对一切
都成立?若存在,求出
;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/c3ddd6d99ad32dd7fdb1797d8cf94786.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)记集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad91fcb6a27d115bd1bb62ba641e733e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2430dcfadeee37488922e988191403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(3)是否存在等差数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fce83115a50f99e08e9a2db7267aeed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/376004d82428e313b38d8c823fb6413e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
您最近一年使用:0次
2020-07-17更新
|
259次组卷
|
3卷引用:湖南省沅陵县第一中学2021-2022学年高二下学期月考模拟数学试题
湖南省沅陵县第一中学2021-2022学年高二下学期月考模拟数学试题(已下线)秘籍07 数列-备战2022年高考数学抢分秘籍(新高考专用)江苏省连云港市赣榆区2020届高三(6月份)高考数学仿真训练试题