设
是等差数列
的前
项和.若
,则
( ).
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcbc4b5f4552cde04ac3e73f1bde84a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e0bb02bafab8f236c9c21db384d114.png)
A.![]() | B.![]() | C.![]() | D.![]() |
2010高二·河南·竞赛 查看更多[1]
(已下线)2010年全国高中数学联赛河南省预赛(高二)试题
更新时间:2019-01-29 21:06:10
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【知识点】 数列通项公式求解
相似题推荐
单选题
|
适中
(0.65)
【推荐1】设数列
满足
,
.若
为
的前n项和,则
的个位数字为.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ecf69901899bba130968c7a091790d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2622eb7a25fbe22f2e74a478788dfb.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/b6252e443f22097fc949fa0540eb898d.png)
A.l | B.2 | C.5 | D.6 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】设
:
,且对所有正整数
,有
,
.则
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4ff0af96ea467337cb30c4c765b5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30ca2e83290802c3b7c2d4fd5b3cc2b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422bdeda8a958deff409e52dac6fe4c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a881c7e37dce5c1005ec08f22f029798.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e43d0f4428df4916f882dae4090ab1b3.png)
A.1997 | B.1268 | C.3804 | D.5991 |
您最近一年使用:0次