1 . 如图,已知
是
的直径,弦
于点
,点
是线段
延长线上的一点,连结
交
于点
,连结
交
于点
,连结
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/23a29304-d65b-4a7f-8586-d9c37c27bfd7.png?resizew=177)
(1)求证:
.
(2)若
,求
的值.
(3)在(2)的条件下,设
,
.
①求
关于
的函数表达式;
②若
为
的中点,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/23a29304-d65b-4a7f-8586-d9c37c27bfd7.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7a9d0490454cec4b5005e0c21ee18ae.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d75cecc3a0f28b65ce7d1de7e9c36c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ff13b1cb8e5d805811e904a2d6f6cd.png)
(3)在(2)的条件下,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8beb9a6cda1bb89cac02974e6e2a8622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b6c6a34abfcb78e52c01ca60250bdd3.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85fb9ac7497c05f82c2b86fa9e0625fd.png)
您最近一年使用:0次
2024-02-04更新
|
261次组卷
|
2卷引用:湖南省长沙市雅礼集团2023-2024学年九年级上学期期末数学试题
名校
2 . 如图,在
中,
是边
的中点,连接
交
于点
.若
,则
的长是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adaead91b4b6febfcdd6f995d81e550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/2/ec9cb7ef-d642-4c93-87a7-1acd02cf0266.png?resizew=161)
您最近一年使用:0次
3 . 如图,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04cb7540784842b3651b2c480bc766ce.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f9640422ceff8c7aa3a55350f76082.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b79854ad796bd2e2ed5e4cc8ae06830.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04cb7540784842b3651b2c480bc766ce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/31/dc8c884c-5c2f-4ac0-992f-7ac842376cab.jpg?resizew=153)
您最近一年使用:0次
4 . 如图,在正方形
中,
是
的中点,
是
上一点,且
,下列结论:①
;②
;③
;④
.其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77c1441979b0a396730e612eb9ac408c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1bc56e64379dd4ec9e627e53648c4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c3316975ecd3a43058c29ed0a8e0fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce726bceb02452bb4e5ed6b00fa94e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f3327f9755308e9be1ff45f52f9ed0b.png)
A.①③④ | B.①②③ | C.②④ | D.②③ |
您最近一年使用:0次
5 . 如图,点
为反比例函数
的图象在第一象限内一点,在
轴正半轴上有一点
,且
,连接
,
且
,在
轴上有一点
,直线
交
轴于点
.
(1)求反比例函数的表达式;
(2)设点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b50e15e15e85e3e77c513461241d2a9.png)
是
轴上一动点,过点
作
交直线
于点
,连接
,设
,
用含
的代数式表示
;
求
取最大值时
点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e980cddf753345d3bbb3424f117726f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05621b18b7ffc991d9f30380e2e08fea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63447ea996b9036a7a7ae726cc382cdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70da7465a47de95fcf7be6dbf68e5de1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f10f6cb1d9325b6496c1eabead2c6ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/29/6e7515ad-e23b-44bb-aa14-6f9eb28b83fe.png?resizew=187)
(1)求反比例函数的表达式;
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b50e15e15e85e3e77c513461241d2a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07eabb3ff92cc5e071c48df759e64ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad5344f15941f91762195ee3fb46c417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92fcb8ed842b86c5bed0761c71877c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
名校
6 . 如图,
为
的外接圆,点B为
的中点,点M为
上一点,连接
,且
,连接
交
于D点,过M点作
的切线交
延长线于E点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/ad4d4a52-54fc-4aea-ae4b-6fe0faea16fd.png?resizew=200)
(1)判断
的形状;
(2)求证:
;
(3)已知
的半径为
,且
平分
;
①求
;
②
是否为定值,若是请求出定值,若不是请说明理由.(结果用
表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0ff808cf596294204a404d0a34f3e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71272f10d3f406389c53e73966934380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/ad4d4a52-54fc-4aea-ae4b-6fe0faea16fd.png?resizew=200)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f43f564a439032f5769a3f1799a5bb3.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b300d886f70d7e058061f6ddc203e8d8.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9c2c581786fb7d894ec2b9c26e3958.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a6866005ac7cf20de7004f069a3b95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
您最近一年使用:0次
名校
7 . 如图,正方形
的边长是3,
,连接
、
交于点
,并分别与边
、
交于点
、
,连接
,下列结论:①
;②
;③
;④当
时,
,其中正确结论的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/16c6b433-d531-41f7-9f7b-b049ca55bb01.png?resizew=145)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cdc346d78b31a196d99e910b39469e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a45db9d2febc48ac747c244729e8927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07432604b65455ef38849d2997e8232.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7885632753de83b5ebbcd0e8d4a2c059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d10f2db7289ff1ec65c47d9af77a9c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b62ab70dfa2d20423313b3b176e7a93.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/16c6b433-d531-41f7-9f7b-b049ca55bb01.png?resizew=145)
A.①③④ | B.①③ | C.②④ | D.①②④ |
您最近一年使用:0次
8 . 如图,已知二次函数
的图象与x轴交于点
和点B,与y轴交于点
,点P是抛物线上点A与点C之间的动点(不包括点A,点C).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/28/c82c96dc-cc0e-4cc9-9c1d-cafdccdfd6c2.png?resizew=338)
(1)求此二次函数的解析式;
(2)如图1,连结
,求
的面积的最大值;
(3)如图2,过点P作x轴的垂线交于点D,与
交于点Q.探究是否存在点P,使得以点P、C、Q为顶点的三角形与
相似?若存在,直接写出点P的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c33700c3358cbbd8db376f9f0613b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850e01debd266a398b597a1876dbb3ea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/28/c82c96dc-cc0e-4cc9-9c1d-cafdccdfd6c2.png?resizew=338)
(1)求此二次函数的解析式;
(2)如图1,连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c4c5870e1d93689fd6e8633a2f634a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
(3)如图2,过点P作x轴的垂线交于点D,与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41984f53bb280ba8b5ac00a52ce2825.png)
您最近一年使用:0次
9 . 如图,二次函数
的图象经过点
,
,点
为二次函数第一象限内抛物线上一动点,
轴于点
,交直线
于点
,以
为直径的圆
与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/54ec431c-aa5d-4991-b779-72dd27fa854a.png?resizew=197)
(1)求
,
的值;
(2)当
周长最大时,求此时点
点坐标及
周长;
(3)连接
、
,当
时,求出点
点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36488f7dff759ace2a27e56c3857056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b4e2ad842cdc7d86da465631ca77ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fef27cb7cb1b666c1734c65a7aa9aa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/27/54ec431c-aa5d-4991-b779-72dd27fa854a.png?resizew=197)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518c86becceed3eafafd3ff92d6f8add.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/518c86becceed3eafafd3ff92d6f8add.png)
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d6935948fe6ba04f4d53ec22f7c17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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名校
10 . 定义:用一条直线截三角形的两边,若所截得的四边形对角互补,则称该直线为三角形第三条边的“幸福线”.如图1,
为
的截线,截得四边形
,若
,则称
为
边
的“幸福线”.
为
边的“幸福线”,
,
,
,求
的长;
(2)如图2,若
内接于
,
为弧
的中点,
、
分别为
、
边的“幸福线",求证:
;
,
,如图3过
点作
的“幸福线”
交
于点
,当四边形
面积最大时,求
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c42bce098904b241986bb91c65ab33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2121f7587818ad20cc350251563b4d71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb3d1070981fed5ca65a34bb2282e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ad4c0ba3a6750537789844d0ec419d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c69baaff0b38cac0e000c64f72d75336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b939af5ba06e279cce39396aaf0fae06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72d8a3dc6cb93171ee20567b5440775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
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