1 . 如图,在正三棱锥
中,高
,
,点
分别为
的中点,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/acca30c7-b433-4af0-b4bb-fdfe8db2a31f.png?resizew=149)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f091d853ef8f4133dfa73d7b9622cee6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ddad21a6de8f54e65123d274c0098c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589c3cc1f331dbb2248b0829039df7f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767a402819fb57091083236369e8df29.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/acca30c7-b433-4af0-b4bb-fdfe8db2a31f.png?resizew=149)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-02-14更新
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2卷引用:江西省上进联盟2023-2024学年高二上学期1月期末联考数学试题
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2 . 已知三棱锥
的棱长均为6,其内有
个小球,球
与三棱锥
的四个面都相切,球
与三棱锥
的三个面和球
都相切,如此类推,…,球
与三棱锥
的三个面和球
都相切(
,且
),则球
的表面积等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be77704255b3cadb7ae2a66ec35205ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28cc0f93939bfa9e1f913b18dd9d15ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a70b95c53fb6655721e2a8c61f5c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be77704255b3cadb7ae2a66ec35205ec.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2卷引用:江西省新余市2023-2024学年高三上学期期末质量检测数学试卷