名校
1 . 已知空间中三点
,
,
.
(1)若
,
,
三点共线,求
的值;
(2)若
,
的夹角是钝角,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a983a2fcde124f0bd5ff0d2822066df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d361b579e9c2f7ad72a2385e13a95f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a113cb6f6bcf58bc54688dbac0f5f8a0.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fe2d802f2b37e7db198c5a3c1df9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1da92a2fc2ce861e82f7192fe4e648f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd1f0ace9ca0b79929e73af6c201c2e.png)
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2022-04-28更新
|
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10卷引用:新疆石河子第一中学2023-2024学年高二上学期9月月考数学试题
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2 . 如图,已知
,
,
,
,
,
,
,
,
为空间的
个点,且
,
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/c218f69c-19d7-4217-91f4-52d1c4c21d19.png?resizew=144)
(1)求证:
,
,
,
四点共面,
,
,
,
四点共面;
(2)求证:平面
平面
;
(3)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/328f0c19f2d0b28b29a54a10753bce37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46352467c0c506859e0636a05a5a9cdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dba0b6b03c74f290ee9fc3dbb5a7546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ebef64fab4d6e546cbc2d1773c9d7ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec50b415b3aa3c411b644742c5d60a1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baedc4d7e690ab3f7d80d30ba0a9efe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/c218f69c-19d7-4217-91f4-52d1c4c21d19.png?resizew=144)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04de6e3d84ddf7da3dc4fab26e59df46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aea384826175316e3c89f68abd8e2ee1.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c43715f5c90960325c62d91ee2d5bd.png)
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2021-12-10更新
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7卷引用:新疆克孜勒苏柯尔克孜自治州第一中学2022-2023学年高二上学期期中数学试题
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