名校
解题方法
1 . 两个等差数列
、
的前n项和分别为
、
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d3d080db7dc0e796230816506deff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bfc3bfd046d79a6b0395ae6422f2fbe.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
2 . 对于由正整数构成的数列
,若对任意
,
“且
,
也是
中的项,则称
为
数列”.设数列
|满足
,
..
(1)请给出一个
的通项公式,使得
既是等差数列也是“
数列”,并说明理由;
(2)根据你给出的通项公式,设
的前
项和为
,求满足
的正整数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5eaabd730c048ddab34542386ce025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d9712c3b25f3030e166e136d3a4686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3df32a2bc9b95f2e6364e4fcbe44f8b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5eaabd730c048ddab34542386ce025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5eaabd730c048ddab34542386ce025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ecf69901899bba130968c7a091790d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6fb3ead574280c480251552847c157d.png)
(1)请给出一个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(2)根据你给出的通项公式,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.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/74b32da53face45d9ddf1810cb2a5c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2020-05-06更新
|
331次组卷
|
2卷引用:2020届天一大联考海南省高三年级第三次模拟考试数学试题