2024·山东·模拟预测
解题方法
1 . 设异面直线
与
所成的角为
,公垂线段为
,且
,
、
分别直线m、n上的动点,且
,
为线段
中点,建立适当的平面直角坐标系可确定点
的轨迹方程
.
(1)请根据自己建立的平面直角坐标系求出
.
(2)
为
的任意内接三角形,点
为
的外心,若直线
的斜率存在,分别为
,
,
,
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe3080ed8cb377910703dd956207fa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da895d8bd043625a0839128252130d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b1ba4307cfde9b424d468bfcdf6c5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0e4a2447b62462f97d8dcf59fdff728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f9b255a8da2b914a84a848e0ec499d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(1)请根据自己建立的平面直角坐标系求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80792ba7adda47f55640c29312ccc496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee82d6e88e4e5e88fdf8896815ca678.png)
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解题方法
2 . 如图,正方体
的棱长为1,P为
的中点,M在侧面
上,若
,则
面积的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7ddbb49c644bf06ccbad885ba2c84a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e17230625e72d3a9c6d72ff61019ff61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9780cae90668d9d55b14ec0fc4894d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef895b24399fc0225d1c4ad7fb4e11c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d824a52b7f1a34c82725bcad7b6c4d57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/812cfa48-663b-4dd9-8a84-e2982913a907.png?resizew=184)
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|
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6卷引用:山东省滨州邹平市黄山中学2022-2023学年高二上学期10月月考数学试题
山东省滨州邹平市黄山中学2022-2023学年高二上学期10月月考数学试题江西省吉安市第一中学2022-2023学年高三上学期11月期中考试理科数学试题上海市晋元高级中学2022-2023学年高二上学期期末数学试题江西省宁冈中学2023届高三一模数学(文)试题江西省宁冈中学2023届高三一模数学(理)试题(已下线)第三章 空间轨迹问题 专题六 立体几何轨迹中的范围、最值问题 微点2 立体几何轨迹中的范围、最值问题综合训练【培优版】
3 . 如图,在斜三棱柱
中,
,
为
的中点,
为
的中点,平面
平面
,异面直线
与
互相垂直.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/d8621bd9-aeae-41d5-a77a-48e7b23ea547.png?resizew=169)
(1)求证:平面
平面
;
(2)若
与平面
的距离为
,
,三棱锥
的体积为
,试写出
关于
的函数关系式;
(3)在(2)的条件下,当
与平面
的距离为多少时,三棱锥
的体积取得最大值?并求出最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05663419cc1e71688b70688376889e0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/d8621bd9-aeae-41d5-a77a-48e7b23ea547.png?resizew=169)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762d6733880f540d3ead64f728879fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80a5bc11a77c2d0c4631b8dae59d451c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1929bc67807d42fbb93a07387d78cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a41ccd4d9072c4a306bfeebc7156794b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)在(2)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a41ccd4d9072c4a306bfeebc7156794b.png)
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山东省齐鲁2021-2022学年3月份高一阶段性质量检测试卷A山东省德州市夏津育中万隆中英文高级中学2021-2022学年高一下学期第二次月考数学试题上海市西南位育中学2020-2021学年高二下学期期中数学试题(已下线)江苏省扬州市2021-2022学年高一下学期期末适应性测试数学试题(已下线)第11讲 柱、锥、台的体积(核心考点讲与练)-2022-2023学年高二数学考试满分全攻略(沪教版2020必修第三册)四川省成都市树德中学2023-2024学年高二上学期10月阶段性测试数学试题
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4 . 在三棱锥
中,底面
是以
为斜边的等腰直角三角形,且
,
,
与底面
所成的角的正弦值为
,则三棱锥
的外接球的体积为_______ .
![](https://img.xkw.com/dksih/QBM/2020/4/13/2440491777417216/2440771617505280/STEM/37c65cdd-bcda-43d1-ba6d-524f7b70db67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/603de302cb6fa781b16a0be8c828c7a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://img.xkw.com/dksih/QBM/2020/4/13/2440491777417216/2440771617505280/STEM/37c65cdd-bcda-43d1-ba6d-524f7b70db67.png)
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5 . 已知四边形
为矩形,
,
为
的中点,将
沿
折起,得到四棱锥
,设
的中点为
,在翻折过程中,得到如下有三个命题:
①
平面
,且
的长度为定值
;
②三棱锥
的最大体积为
;
③在翻折过程中,存在某个位置,使得
.
其中正确命题的序号为__________ .(写出所有正确结论的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc28e69c1ba0aac981256887f7dfa94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e1e88b36ff71fe69c07bade0f95f1ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/519862a321d8067fb18dd2af1affb2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f214481e6b23307a37940f6dd0313d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48856dc77af21bf856c6ea77a9077e00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
②三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2237c2fbad38af97db3f35f7d7e83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c14ff9b66f21c05e52dc3c8908c2df.png)
③在翻折过程中,存在某个位置,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b245e1ed221af9abc5c845face3a56.png)
其中正确命题的序号为
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17卷引用:强化卷05(3月)-冲刺2020高考数学之拿高分题目强化卷(山东专版)
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