名校
解题方法
1 . 如图在边长是
的正方体
中,
,
分别为
,
的中点.应用空间向量方法求解下列问题.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/9fe6468a-743a-4379-a4a0-2f7dd7930638.png?resizew=263)
(1)证明:
平面
;
(2)证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9880952857950577055578875ab29141.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7ddbb49c644bf06ccbad885ba2c84a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252053b853152bd294a8315debd00b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655b6a742dbacdab5aaa298007663dd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475e6a90dcd426d7c88b83f9e20e6578.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/9fe6468a-743a-4379-a4a0-2f7dd7930638.png?resizew=263)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119443fa34dbcd836ad231f727600afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f563e440c2400574de49eb063c46a065.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92dc7c262bba52d1b97c17c6d07e9d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6610370a5aefaf45fdb579521484e3b5.png)
您最近一年使用:0次
2022-10-24更新
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427次组卷
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2卷引用:吉林省吉林市蛟河市第二高级中学校2022-2023学年高二上学期期中数学试题