1 . 己知等差数列
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8a4222d88c26774f9307e18138eaa32.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ebaff03c5c3eb3a3127f06c784bf58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8a4222d88c26774f9307e18138eaa32.png)
您最近一年使用:0次
解题方法
2 . 若椭圆
的长轴长、焦距、短轴长成等差数列,则该椭圆的离心率是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
您最近一年使用:0次
3 .
与
的等差中项为_____
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7001eac39f3712c2ac2f84f8658e5eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6020f472c8a15e3754cb24c8f09b8b0.png)
您最近一年使用:0次
名校
4 . 数列
满足
(
为正整数),且
与
的等差中项是5,则首项![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ce9d5623b21817dd182b9058dc271a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
您最近一年使用:0次
2024-06-18更新
|
184次组卷
|
3卷引用:上海市格致中学2024届高三下学期三模数学试卷
名校
解题方法
5 . 记等差数列
的前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11e2bf8d65c24fc845446a32d881bd4.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/0ac5b045f699a9507ae0cff186029369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11e2bf8d65c24fc845446a32d881bd4.png)
您最近一年使用:0次
6 . 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)
您最近一年使用:0次
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)
您最近一年使用:0次
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
|
1068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
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上海市松江二中2023-2024学年高二下学期期中数学试卷(已下线)数学(上海卷01)(已下线)专题04数列全章复习攻略--高二期末考点大串讲(沪教版2020选修)四川省蓬溪中学校2023-2024学年高二下学期5月月考数学试题黑龙江省佳木斯市三校2023-2024学年高二下学期4月期中联考数学试题
名校
10 . 设数列
为等差数列,若
,则公差![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851b2537c575f28d83e1eb9b58da8ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
您最近一年使用:0次