四边形ABCD是⊙的内接四边形,AC为直径,
,DE⊥BC,垂足为E.
![](https://img.xkw.com/dksih/QBM/2022/3/25/2943910395428864/2964359207182336/STEM/0f90225f-f1f6-48d7-9d33-1b67af5301ab.png?resizew=156)
(1)求证:CD平分∠ACE;
(2)判断直线ED与⊙O的位置关系,并说明理由;
(3)若CE=1,AC=4,求阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b5747661c4af370abed8ed6392460.png)
![](https://img.xkw.com/dksih/QBM/2022/3/25/2943910395428864/2964359207182336/STEM/0f90225f-f1f6-48d7-9d33-1b67af5301ab.png?resizew=156)
(1)求证:CD平分∠ACE;
(2)判断直线ED与⊙O的位置关系,并说明理由;
(3)若CE=1,AC=4,求阴影部分的面积.
2015·江苏泰州·一模 查看更多[10]
2015届江苏省靖江市靖城中学共同体九年级第一次模拟考试数学试卷2015届江苏省南京市雨花、浦口和栖霞联合体中考一模数学试卷2016届内蒙古巴彦淖尔市临河区九年级下学期第一次月考数学试卷江苏省盐城市南洋中学2018届九年级下学期第一次月考数学试题江苏省高邮市2018届九年级下学期第一次月考数学试题2017年江苏省扬州市广陵区树人学校中考数学二模试卷【校级联考】陕西省宝鸡市岐山县2019届九年级中考数学一模试卷泸州市古蔺县实验学校2020-2021学年九年级上学期期中数学试题江苏省扬州市江都区实验初级中学2021-2022学年九年级下学期3月月考数学试题(一模)江西省新余市第四中学2023-2024学年九年级下学期开学考试数学试题
更新时间:2022-04-23 14:27:09
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解答题-证明题
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【推荐1】如图,
是
的角平分线, 延长
交
的外接圆
于点
,过
三点的圆
交
的延长线于点
,连结
.
(1)求证:
∽
;
(2) 若
, 求
的长;
(3) 若
∥
, 试判断
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdfa1efa3490a7d6cd8621535b2067ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d89c245336052ef5d2a5214f39d5f58.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425e79e4e7c13e2ea8ae3d4f8d31ac33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/556f6db0a23accae274d176616ea86fe.png)
(2) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b02b570040e00764979c3f379b98cc5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d73d6dde62cacc0d1fc589d3f1565304.png)
![](https://img.xkw.com/dksih/QBM/2012/9/13/1573516092620800/1573516200157184/STEM/16e5ad42abf74ca594ca9cd5b268fd09.png)
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【推荐2】如图,
是⊙
的直径,
是弦,
平分
交⊙
于
,连
交
于
,
与
交于点
.
(1)若
,求
的度数;
(2)若⊙
的半径为
,且
是
的中点,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/decb9bb7673a3eefac7940155b53ce2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721c75fcd58d3d54260aad0f82e09e37.png)
(2)若⊙
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2020/12/3/2606264909234176/2613507413737472/STEM/86829eacc70d4e269b2356429914cfd4.png?resizew=204)
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【推荐1】如图,在Rt△ABC中,∠BAC=90°,CD平分∠ACB,交AB于点D,以点D为圆心,DA为半径的⊙D与AB相交于点E.
(1)判断直线BC与⊙D的位置关系,并证明你的结论.
(2)若AC=3,BC=5,求BE的长.
(1)判断直线BC与⊙D的位置关系,并证明你的结论.
(2)若AC=3,BC=5,求BE的长.
![](https://img.xkw.com/dksih/QBM/2020/1/3/2368977857765376/2369108477566976/STEM/d0f49a0c3e594adb9ba0bdc9a6d3e8e3.png?resizew=164)
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【推荐2】如图,
内接于
,
是
的直径,C是
延长线上一点,连接
,过点O作
交
于点F,且
.
是
的切线;
(2)若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb3d1070981fed5ca65a34bb2282e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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【推荐1】在
中,
,点P是平面内不与点A,C重合的任意一点.连接
,将线段
绕点P逆时针旋转α得到线段
,连接
,
,
.
,点P在
内部时,探索
与
之间的数量关系,并说明理由;
(2)如图2,当
时,求
的值及直线
与直线
相交所成的较小角的度数;
(3)当
时,若点E,F分别是
,
的中点,点P在直线
上,当点C,P,D在同一直线上时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0efdd4d0ca25d68ef7bc0432f2f5cb.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d48943db264c08adaf6ae0766fd56459.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
(2)如图2,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a9746e5dc91718774788551c824ac61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfaca9396f85c0137b534903321fcbe.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ac762a2899a58faa0d3ab44f1281fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b49022a6f55817b5d7e3ab443b5491.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b23e3ee827018557d6c88edd5369a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9177a88d6ce68c84a63dd26224ab5bc8.png)
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【推荐2】如图1.在正方形
中,点F,H分别在边
,
上,连结
,
交于点E,已知
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/17/8c5a413b-799d-4fbe-9d85-e9641a42f473.png?resizew=436)
(1)线段
与
垂直吗?请说明理由.
(2)如图2,过点A,H,F的圆交
于点P,连结
交
于点K.求证:
.
(3)如图3,在(2)的条件下,当点K是线段
的中点时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d54a3e611afac9843ab7f474b721cabb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/17/8c5a413b-799d-4fbe-9d85-e9641a42f473.png?resizew=436)
(1)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
(2)如图2,过点A,H,F的圆交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b9eb0bac396fae38b843f195e5b1df1.png)
(3)如图3,在(2)的条件下,当点K是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf0c9bd928f5703b056cefc7e5758c0.png)
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【推荐1】如图,⊙O是直角三角形ABC的外接圆,直径AC=4,过C点作⊙O的切线,与AB延长线交于点D,M为CD的中点,连接BM,OM,且BC与OM相交于点N.
![](https://img.xkw.com/dksih/QBM/2022/2/8/2912177528446976/2913942034636800/STEM/6e8b7da0-a9d9-4d65-975b-d6baf2993703.png?resizew=257)
(1)求证:BM与⊙O相切;
(2)当∠BAC=60°时,求弦AB和弧AB所夹图形的面积;
(3)在(2)的条件下,在弧AB上取一点F,使∠ABF=15°,连接OF交弦AB于点H,求FH的长度是多少?
![](https://img.xkw.com/dksih/QBM/2022/2/8/2912177528446976/2913942034636800/STEM/6e8b7da0-a9d9-4d65-975b-d6baf2993703.png?resizew=257)
(1)求证:BM与⊙O相切;
(2)当∠BAC=60°时,求弦AB和弧AB所夹图形的面积;
(3)在(2)的条件下,在弧AB上取一点F,使∠ABF=15°,连接OF交弦AB于点H,求FH的长度是多少?
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【推荐2】如图,
内接于半径为1的
,
,过点A作
,
的延长线交
于点E,交直线
于点D,连接
.
(1)求证:
是
的切线;
(2)若
,求图中阴影部分的面积;
(3)记
的面积为
,
的面积为
,
的面积为
,若
,求
的值.
![](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/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/23/7a6da17a-380a-4656-ab29-f5850eb4a3cf.png?resizew=141)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810242c9205006b28c6bc6612c2b1cd0.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea46133f0ce8a230e503f150955c6d6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2657e02314469ad2b13d31dce41b4343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1eef87428af97baf1b0b90c5dfb282b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7dd37bdc8ebd0561555e698ee7f1bc6.png)
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【推荐3】【阅读材料】
请运用上述阅读材料中获取的经验和方法解决下列问题.
【基础应用】已知
中,
,点
在边
上,点
在边
的延长线上,连接
交
于点
.
(1)如图1,若
,
,求证:点
是
的中点;
(2)如图2,若
,
,探究
与
之间的数量关系;
【灵活应用】如图3,
是半圆
的直径,点
是半圆上一点,点
是
上一点,点
在
延长线上,
,
,
,当点
从点
运动到点
,点
运动的路径长为______,
扫过的面积为______.
教材习题 | 如图,![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
问题分析 | 由条件易证![]() ![]() ![]() ![]() | |
方法提取 | 构造“平行![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/18/27a43022-f8bb-4643-b6a5-bcba9a03429f.png?resizew=534)
请运用上述阅读材料中获取的经验和方法解决下列问题.
【基础应用】已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5181b97a7e43959b8455680157c3b644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8fe122a768a4d78b5b39817d557a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
【灵活应用】如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3f70794c05487973e77dd74ba48793a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
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