解题方法
1 . 如图,已知四棱锥
的底面是平行四边形,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/8e9531ac-b46c-4ad9-b360-2e1ceaffd963.png?resizew=160)
(1)求证:
平面
;
(2)若点
分别是棱
,
的中点,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c3703cc0971a5c65eb388d6ee64862.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/8e9531ac-b46c-4ad9-b360-2e1ceaffd963.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
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2020-04-06更新
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4卷引用:安徽省合肥市双凤高级中学2022届高三二模文科数学试题
安徽省合肥市双凤高级中学2022届高三二模文科数学试题(已下线)第03讲 空间直线、平面的平行 (高频考点—精讲)-2江苏省南京市2019-2020学年高二上学期期中数学试题江苏省徐州市铜山区大许中学2020-2021学年高二上学期调研测试数学试题