解题方法
1 . 已知直四棱柱的底面
是菱形,且
,
分别是侧棱
的中点.
(1)证明:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a46615f8a942d2b83f40a71ff96eef.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
您最近一年使用:0次
2024-01-23更新
|
91次组卷
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3卷引用:山西省忻州市2023-2024学年高二上学期1月期末考试数学试题
名校
解题方法
2 . 如图,在四棱柱ABCD-A1B1C1D1中,侧棱A1A⊥平面ABCD,AB∥DC,AB⊥AD,AD=CD=2,AA1=AB=4,E为棱AA1的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/33bf0b9c-bee0-4925-84e7-8025c208ac5e.png?resizew=168)
(1)证明:BC⊥C1E.
(2)设
=λ
(0<λ<1),若C1到平面BB1M的距离为
,求λ.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/13/33bf0b9c-bee0-4925-84e7-8025c208ac5e.png?resizew=168)
(1)证明:BC⊥C1E.
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eecfe95150ef2fbfb2f276a0d637b54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0735144f6e24b6b32028ff14c17c1cec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
您最近一年使用:0次
2023-02-11更新
|
452次组卷
|
6卷引用:山西省忻州市河曲县中学校2022-2023学年高二下学期开学考试数学试题