1 . 如图,在五面体
中,四边形
是矩形,平面
平面
,
是正三角形,
,
,
.
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41d3f7d55fcbaebc4e2450ac63a3dc5.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb9eff13d9afbbc79a05afbc0cbcfa3c.png)
您最近一年使用:0次
解题方法
2 . 如图,四棱锥
中,底面
是边长为2的正方形,
,
底面
,
平面
;
(2)若
平面
,证明:
为
的中点;
(3)若
,在
上是否存在点
,使得
平面
,若存在点
,则
为何值时?直线
与底面
所成角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd7f77f2f984f75eb5e17224fae3d924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa69a2247ad4d5231aa361349b12f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18c7864ddce7345ae8dd180d4390a981.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
您最近一年使用:0次
解题方法
3 . 如图,在三棱柱
中,侧面
和
均为正方形,
,平面
⊥平面
,点M是
的中点,N为线段AC上的动点;
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/0fdd75ee-58e8-47e7-bbc5-633ab4ca1aec.png?resizew=167)
(1)若直线
平面BCM,求证:N为线段AC的中点;
(2)若直线
与平面
所成角的正弦值为
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/0fdd75ee-58e8-47e7-bbc5-633ab4ca1aec.png?resizew=167)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8035e65bc2644d893b0a952712280b9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a604466a9c8d10d557b3dfc43b547065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2a0a3bb566b5d2404e4bb823abddfa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a8b76e36783a69d14ec54af82c7df0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a604466a9c8d10d557b3dfc43b547065.png)
您最近一年使用:0次
2024-03-12更新
|
672次组卷
|
2卷引用:北京市平谷区2023-2024学年高三下学期质量监控(零模)数学试卷
名校
解题方法
4 . 如图在几何体ABCDFE中,底面ABCD为菱形,
,
,
,
.
(2)若面
面
;求:
(ⅰ)平面
与平面CEF所成角的大小;
(ⅱ)求点A到平面CEF的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751ecec223e69ea940ffe196aa1463ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b1472e121da0ae5550329cfda5f0a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d5080736a493e749de927807c3dc8ac.png)
(2)若面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bde1e200d1dd5ddc433c876c9d2f688c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(ⅰ)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(ⅱ)求点A到平面CEF的距离.
您最近一年使用:0次
名校
解题方法
5 . 如图,在四棱锥
中,
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1573ea134172e6f4aab6ebd047f29757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
为棱
的中点,平面
与棱
相交于点
,且
,再从下列两个条件中选择一个作为已知.
条件①:
;条件②:
.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
;
(2)求点
到平面
的距离;
(3)已知点
在棱
上,直线
与平面
所成角的正弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1573ea134172e6f4aab6ebd047f29757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a0be0f7a9612bf6b40139609e3d0aac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422210c777ac0d625bbd81cc7601bf9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7901ce9a29748df90f3996d24df188f.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2c4b7601274731a0f8140c99762501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d70fb53a3bc46be3e6365f5ed26496.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d70fb53a3bc46be3e6365f5ed26496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0519ba613bf121a2c1bc28c948266d74.png)
您最近一年使用:0次
2024-01-22更新
|
397次组卷
|
2卷引用:北京市西城区2023-2024学年高二上学期期末考试数学试卷
名校
6 . 如图,四棱锥
中,
平面
,过
的平面分别与棱
交于点M,N.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/e95dc946-c25c-4d15-a1b0-4b07fc31b4e8.png?resizew=155)
(1)求证:
;
(2)记二面角
的大小为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a632c970535e3dc49bb46519275882e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82fd2c740aea7423ecc2077ed899260.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/e95dc946-c25c-4d15-a1b0-4b07fc31b4e8.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a87e85906b2ee9c5d88d271b748ec33.png)
(2)记二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e13c1dc9dee7eb7aed3d3ef41b2123a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
您最近一年使用:0次
2024-01-17更新
|
488次组卷
|
3卷引用:北京市海淀区2023-2024学年高二上学期期末练习数学试卷
名校
解题方法
7 . 如图,在四棱锥
中,
为
的中点,
平面
.
;
(2)若
,再从条件①、条件②、条件③这三个条件中选择一个作为已知,使四棱锥
存在且唯一确定.
(i)求证:
平面
;
(ⅱ)设平面
平面
,求二面角
的余弦值.
条件①:
;
条件②:
;
条件③:
.
注:如果选择的条件不符合要求,第(1)问得0分;如果选择多个符合要求的条件分别解答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca3a13f7b40026800cffd20941532e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac480d8d9d7821b62a603cf5cfda236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d41989d897ddb0fe7aa59f3beaabf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ee81b6066188abee9d167b6c7f3f71.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a165e7bba48af73da91cc1106ebcfb5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(i)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(ⅱ)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90c23f44504cadf914eb71b7631afdd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/154dcd4885cdbaeffe74c61c82e52ba1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/757b1bff2cbba8ac3cd4304a3b1fe968.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/785be2e1b38ecea16cd26a93121feccd.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
条件③:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d35013640f1f37b9c74ae35803dd0bc.png)
注:如果选择的条件不符合要求,第(1)问得0分;如果选择多个符合要求的条件分别解答,按第一个解答计分.
您最近一年使用:0次
2024-04-09更新
|
1482次组卷
|
5卷引用:北京市海淀区2024届高三下学期期中练习(一模)数学试题
北京市海淀区2024届高三下学期期中练习(一模)数学试题(已下线)模块三 专题3 高考新题型专练 专题1 劣构题专练(苏教版)(已下线)模块五 专题5 全真拔高模拟5(苏教版高二期中研习)(已下线)6.4 空间向量与立体几何(高考真题素材之十年高考)2四川省绵阳中学2024届高三下学期高考模拟(一)理科数学试题
名校
解题方法
8 . 如图,在五面体
中,底面
为正方形,
.
;
(2)若
为
的中点,
为
的中点,
,再从条件①、条件②这两个条件中选择一个作为已知,求直线
与平面
所成角的正弦值.
条件①:
;
条件②:
.
注:如果选择条件①和条件②分别解答,按第一个解答计分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/410666db488a1c79eca80e51f4278e8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666734423f1818d76a74f171b7420b68.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f6e498f70417224e1f3cf28c5b88df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1976e2a7028cacd09bd7a83ca89bd23.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc5df62e8ac9c74a46462519b95479a.png)
注:如果选择条件①和条件②分别解答,按第一个解答计分
您最近一年使用:0次
2024-04-08更新
|
1984次组卷
|
6卷引用:北京市东城区2023-2024学年高三下学期综合练习(一)(一模)数学试题
北京市东城区2023-2024学年高三下学期综合练习(一)(一模)数学试题(已下线)模块3 第6套 全真模拟篇(已下线)模块五 专题1 全真基础模拟1(苏教版高二期中研习)(已下线)模块三 专题3 高考新题型专练 专题1 劣构题专练(苏教版)江苏省南京航空航天大学苏州附属中学2023-2024学年高三下学期二模阳光测试数学试题广东省梅县东山中学2024届高三下学期第一次模拟考试数学试题
名校
解题方法
9 . 如图,在四棱锥
中,
平面
,底面
为正方形,
.点
在棱
上,过
三点的平面与平面
的交线记为直线
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/974e3400-dfcf-44ba-a571-75125ab119ab.png?resizew=147)
(1)求证:
;
(2)若平面
与平面
所成角的余弦值为
.
(i)确定点
的位置;
(ii)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ae8a383194c8fbb843db7207127a5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2e8754585a460b01bb92af46cd15b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/25/974e3400-dfcf-44ba-a571-75125ab119ab.png?resizew=147)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ee6c7e0dfe134561f818cb51eebe09.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
(i)确定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(ii)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
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名校
10 . 如图,已知等腰梯形
中,
,
,
是
的中点,
,将
沿着
翻折成
,使
平面
.
平面
;
(2)求
与平面
所成的角;
(3)在线段
上是否存在点
,使得
平面
,若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef699f5dc072b853cfe700c6f1abbbae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aef94242f79b15efbff959092a7621a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320a8131d673c99f41180ecf137168e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e4ad880948a6da16951cd124b9653b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f8fda3ac618836ce5ad3cd80616bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/542fe1413bd449356daef489ecf0c6cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da30dfe292fe4271fdb1150a0c45963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28fa14d4841ca3f2fe226688c25c8160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/622f3fcf7ec50de07c8a538f77a235b5.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c87bac85c8fbe3ed2dce5edf910104.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa62df7dff41d7897d3cf3a94e0b5be.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675c6e2941eecb64b358527da4d4999c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2f66702d72329bdfd455f4fe3e724cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71d7150b2eef9696dd470f03ca922986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f832ee46a606926e5d214387027b84.png)
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