解题方法
1 . 已知数列
的前
项和分别为
,若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e567d7e9761951a266953c8d5042ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/478421b81927e435cbcf5acafa89efd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49677329c86ce5b576c55af1b12817cd.png)
A.![]() | B.![]() |
C.![]() ![]() | D.![]() ![]() |
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2 . 已知
是数列
的前n项和,且
,则下列结论正确的是( )
![](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/45b8d5b81b1be5f766f3a2ac8bb84121.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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名校
解题方法
3 . 设数列
的前n项和为
,
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e62d941a924ffae8bc28492f261dd52.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2023-05-11更新
|
451次组卷
|
2卷引用:安徽省淮北市国泰中学2023-2024学年高二下学期第二次月考数学试题
4 . 已知棋盘上标有第0,1,2,...,100站,棋子开始时位于第0站,棋手抛掷均匀硬币走跳棋游戏,若掷出正面,棋子向前跳一站;若掷出反面,棋子向前跳两站,直到跳到第99站(胜利大本营)或第100站(欢乐大本营)时,游戏结束.设棋子跳到第n站的概率为
,
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd9f0611744785d64824693e86e856a9.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次