1 . 正方体
中,点
为线段
上的动点.
①当
为
的中点时,
面积最小;
②无论
在线段
的什么位置,均满足
;
③在线段
上存在一点
,使得
;
④三棱锥
的体积为定值.
以上正确结论的序号为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b4c381409a8d4bf6a9d65fbd23cec00.png)
②无论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c0e33b9d4ed545cd32c69e5f668b9f.png)
③在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e2d8f2ecd57a48f0645a0c8d9e5779.png)
④三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165a5001b1f0d8d89ed8e04607ac58ba.png)
以上正确结论的序号为
您最近一年使用:0次
2022-04-16更新
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746次组卷
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2卷引用:甘肃省2022届高三第二次高考诊断考试数学(理)试题