1 .
,
分别是数列
,
前
项和,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
_______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7978d7bd6f6caf9ac9837ffce5f89654.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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41943438b569f22d7bf5c042c134f169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cdd8c77007c2b8524c457d987a93601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7978d7bd6f6caf9ac9837ffce5f89654.png)
您最近一年使用:0次
名校
2 . 已知数列
的通项公式为
,则其前n项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a277cd9275827618b34f6c86e94b7f7.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe229b24e2d56ff6b491725ceae4ff2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167a1ffad2816add8c69302763e8c33b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a277cd9275827618b34f6c86e94b7f7.png)
您最近一年使用:0次
2018-12-13更新
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816次组卷
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3卷引用:海南华侨中学2021-2022学年高二下学期第一阶段考试数学试题