名校
解题方法
1 . 已知无穷等比数列
中,首项
,公比
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7cee45170ef38fc988fd04d1e223d94.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e3fc803117ae94861839984a0afef4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7cee45170ef38fc988fd04d1e223d94.png)
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2 . 若数列
是首项为1,公比为2的等比数列,记其前n项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9620357ea5be4037cfdccd09a27d3862.png)
______ .
![](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/9620357ea5be4037cfdccd09a27d3862.png)
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3 . 已知数列![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8363a0b794ac041bb8c42c8dd4122ddb.png)
,则由这两个数列公共项从小到大排列得到的数列为
,则数列
的通项公式为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8363a0b794ac041bb8c42c8dd4122ddb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e623b77bc2e46e42621f25c04021be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ab0309e2cd35585ea9fb2cc3017abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ab0309e2cd35585ea9fb2cc3017abf.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2024-06-13更新
|
553次组卷
|
3卷引用:上海市实验学校2023-2024学年高三下学期四模数学试题
4 . 已知等差数列
的通项公式为
,则公差![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a4658ab94306d39aedda17deed7216.png)
_______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c0e966db2d11c9dba1454ac6fcb8e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a4658ab94306d39aedda17deed7216.png)
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名校
5 . ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c4dca606b8fbbfe204a29243d3a0b2.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37c4dca606b8fbbfe204a29243d3a0b2.png)
您最近一年使用:0次
名校
解题方法
6 . 已知数列
是首项为23,公差为-4的等差数列.
(1)求
的通项公式;
(2)设
的前n项和为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)设
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
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名校
7 . 若
与a的等差中项为18,则实数a的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ed3d890bed5da0e505ac5398641309.png)
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8 . 已知等差数列
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/656adcdd389ee66255e039b6680a35b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e4487468ab2823d6dbf7f0ebd2eb38.png)
您最近一年使用:0次
名校
9 . 已知等比数列
的公比
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdfe37d536c2f83b8da9810fd410f82e.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/181d31b11f775b4e5699a00b66aacade.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdfe37d536c2f83b8da9810fd410f82e.png)
您最近一年使用:0次
2024-04-10更新
|
1060次组卷
|
2卷引用:上海市宜川中学2024届高三下学期2月开学考试数学试题
名校
10 . 已知等差数列
满足
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfc875ca919921e8f63a6fca648561b.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a71e56f374084c51b0b761c14d750dae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0d29f34218cd60cc6e9ce4dcd13925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfc875ca919921e8f63a6fca648561b.png)
您最近一年使用:0次
2024-04-01更新
|
1061次组卷
|
6卷引用:上海市浦东新区2024届高三下学期期中教学质量检测数学试卷
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