在
和
之间插入
个数,组成首项为
,末项为
的等差数列,若这个数列的前
项的和,后
项的和之比为
,则插入数的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0876215b2fd463d151523cd3c6b447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05cfae4155bdd25d51e0636fd7f42d1f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
23-24高二上·上海闵行·期中 查看更多[3]
更新时间:2023-11-10 13:48:28
|
相似题推荐
单选题
|
适中
(0.65)
解题方法
【推荐1】已知等差数列
满足
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c7c3b11d70c31377c018067f05bd1d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9620357ea5be4037cfdccd09a27d3862.png)
A.6 | B.![]() | C.7 | D.10 |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】记
为数列
的前
项和,设甲:
为等差数列,乙:
(其中
),则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179cb87f158f055cb7b636a8b0a95ba3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70469e98fac97c6ee6232983901b53fb.png)
A.甲是乙的充分不必要条件 | B.甲是乙的必要不充分条件 |
C.甲是乙的充要条件 | D.甲是乙的既不充分也不必要条件 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】设等差数列
的前n项和为
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d0da5f80b15ed0f6952e9e32d48ff9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d8b342e45701057b54207a39c864f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa37e5661af68b263a3ed9030d4e9003.png)
A.![]() | B.![]() | C.36 | D.85 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】在等差数列
中,已知
,前
项和
,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/6df1038200f2d97a52c716aab6c3bcb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1aed322d5e349dacab0a9c35f810276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
A.-3 | B.-4 | C.3 | D.4 |
您最近一年使用:0次