1 . 对于任一实数序列
,定义
为序列
,它的第
项是
,假定序列
的所有项都是
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c612fb2fed7c255a981cff9013063f4f.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe336cc2868f8ba1f68f7bf57180014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241d7d16fa61ec1f77ddd9b011f5dbf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7148c109d8b4d73d8cc1455241f85c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fcde3a21ad686b1befcaefea2b6f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50e10cf8121d1c5049d8c625cd0376e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bc11d05aad76672e30e17311d204d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c612fb2fed7c255a981cff9013063f4f.png)
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2018-04-06更新
|
1481次组卷
|
3卷引用:江西省上饶市上饶县中学2017-2018学年高一下学期期末考试数学(理)试题
名校
2 . 点
为正方体
的内切球
球面上的动点,点
为
上一点,
,若球
的体积为
,则动点
的轨迹的长度为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e731ef1ccc1bded5eb2ea551cd79a12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee3bd4ced831e9000e71ef68c44ac3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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2017-05-21更新
|
3678次组卷
|
4卷引用:江西省上饶中学2019-2020学年高一上学期12月月考数学(筑梦班)试题
3 . 已知在
中,
,
,如图,动点
是在以
点为圆心,
为半径的扇形内运动(含边界)且
;设
,则
的取值范围__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf33aa3d1fbed7a3ba2983f1ed27451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e32a859e1616f7a7e4202d58d030794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2010b44225d512da35649f01a95e71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/886c25cbaff27a9c4cf52dacec0eac4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b461cbe5a345727bc752ef8a063cf7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625395433480192/1626594733916160/STEM/724ec2f0-7675-4ae1-81b9-f6f9718c014f.png)
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