名校
解题方法
1 . 已知数列
满足:
,
,记数列
的前
项和为
,若对所有满足条件的列数
,
的最大值为
,最小值为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d06ad126eef8c33fdcd8a55107fe7d.png)
________ .
![](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/559c1f3a1960160a74d45629b3bd6974.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3cf6f2bbe20a404fea41a4d2b1c4c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2d06ad126eef8c33fdcd8a55107fe7d.png)
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2020-12-03更新
|
923次组卷
|
10卷引用:上海市上海师范大学附属中学2021届高三上学期期中数学试题
上海市上海师范大学附属中学2021届高三上学期期中数学试题(已下线)上海市华东师范大学第二附属中学2022-2023学年高二上学期开学考试数学试题上海市南汇中学2022届高三下学期期中数学试题上海市嘉定区、长宁、金山区2019-2020学年高三上学期期末数学试题2020届上海市长宁嘉定金山高三一模数学试题2020届上海市嘉定区高三一模数学试题上海市曹杨二中2020-2021学年高二上学期期中数学试题(已下线)专题4.2 等差数列-2020-2021学年高二数学同步课堂帮帮帮(人教A版2019选择性必修第二册)安徽省宣城市郎溪县2021届高考仿真模拟考试数学(理)试题(已下线)课时25 数列新定义-2022年高考数学一轮复习小题多维练(上海专用)
2 . 已知数列
满足
对任何正整数n均有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d1e0596476420fb430678bbfdcee4c.png)
,设
,则数列
的前2020项之和为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942ed174dfdafaf5f0a68cac579110f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59bdd812ec2067bbdf43c999da249568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4d1e0596476420fb430678bbfdcee4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e557df2f9aeecbc164482608a4c7c88b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/586573c2f2efb721046606904b823e8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ef4c4439b36c2847b0056a116d56d4.png)
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2020-11-29更新
|
427次组卷
|
7卷引用:2020届上海市浦东新区高三二模数学试题
2020届上海市浦东新区高三二模数学试题江苏省无锡市锡山高级中学2020-2021学年高二上学期10月阶段性考试数学试题(已下线)重难点01 数列(基本通项求法)-2021年高考数学【热点·重点·难点】专练(上海专用)(已下线)押第14题 数列小题-备战2021年高考数学(理)临考题号押题(全国卷2)(已下线)专题03 等比数列及前n项和(专题测试)-2020-2021学年高二数学重难点手册(数列篇,人教A版2019选择性必修第二册)(已下线)4.3.2 等比数列前n项和1课时(已下线)第08讲 等差、等比数列- 1
3 . 已知数列
是无穷等比数列,其前n项和是
,若
,
,则
的值为___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3939cb6a7baabdf0060ea4533ae7d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752cf42c1043745a337b6c0394709c70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58abe92020722722506c7b12c7879ac5.png)
您最近一年使用:0次
名校
4 . 已知无穷等比数列
,公比
满足
,
,求实数
的取值范围________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92209aa6bd22398fccaa8f4119e0c6ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e19964ed3a265d5d4761c037542c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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19-20高二下·上海浦东新·期中
名校
解题方法
5 . 设集合
,选择A的两个非空子集B和C,要使C中最小的数大于B中的最大数,则不同的选择方法有________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ce4a85136d079d6745304cb82f8e5b.png)
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6 . 设等比数列
的通项公式为
,前n项和为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a34ed64959855597658e410de08886f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3bed288facef3f7378341b9a593aef8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
您最近一年使用:0次
19-20高一下·上海浦东新·期末
7 . 设数列
的前n项和为
,且
是6和
的等差中项,若对任意的
,都有
,则
的最小值为________ .
![](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/16d51f29158b7a14eafc5d3847f2a51d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c44f89d0c3ea15dab735d445b3cf353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe04409b13fe225707665309adb4cdde.png)
您最近一年使用:0次
2020-08-15更新
|
908次组卷
|
3卷引用:上海市华东师范大学第二附属中学2019-2020学年高一下学期期末数学试题
8 . 已知
,若
,则数列
的前10项的和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1f1b7e9e20d799ee3c06b89a0611c.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a416c1020c9c47e75a4d6793b05979d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93256727724b7f18803bb3235b631f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1f1b7e9e20d799ee3c06b89a0611c.png)
您最近一年使用:0次
2020-08-15更新
|
427次组卷
|
3卷引用:上海市川沙中学2019-2020学年高一下学期期末数学试题
名校
9 . 设无穷数列
的公比为q,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e934bf7fad30dcabd32c1978ce2a49c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0d99fef1aa4dbcc6dc7b30b7d2c9a9.png)
您最近一年使用:0次
10 . 已知
是等比数列,首项是3,公比是
,则前4项和为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
您最近一年使用:0次
2020-07-15更新
|
410次组卷
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3卷引用:上海市建平中学2019-2020学年高一下学期期末数学试题