名校
1 . 如图,在杨辉三角形中,斜线
的上方从
按箭头所示方向可以构成一个“锯齿形”的数列:
,记此数列的前
项之和为
,则
的值为
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/4bc65cb7-006a-4485-88b7-ab984fdef85b.png?resizew=210)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cefdf4af90ad8fd31bc5d4efc896c3b0.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/e4ec960647b98f8f46d7dfcea4213c24.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/4bc65cb7-006a-4485-88b7-ab984fdef85b.png?resizew=210)
A.![]() | B.![]() | C.![]() | D.![]() |
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2016-12-04更新
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5卷引用:2014-2015学年重庆市万州第二高级中学高二3月月考理科数学试卷