如图,在平行四边形ABCD中,点O是对角线AC的中点,点E是BC上一点,且AB=AE,连接EO并延长交AD于点F.过点B作AE的垂线,垂足为H,交AC于点G.
(1)若AH=6,HE=2,求△ABE的面积;
(2)若∠ACB=45°,求证:CG=
DF.
(1)若AH=6,HE=2,求△ABE的面积;
(2)若∠ACB=45°,求证:CG=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/8cc34fff-fbb9-457a-8674-9b6b79ec1f61.png?resizew=176)
更新时间:2021-07-08 20:54:22
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,
为半圆
的直径,半径
,过劣弧
上一点
作
于点
,连接
,交
于点
,
.
![](https://img.xkw.com/dksih/QBM/2019/10/29/2322278443393024/2322541476921344/STEM/81c81e6ed6ba49449f2349dd9ba1c863.png?resizew=244)
(1)若
,则
的长为______.
(2)试写出
与
之间的数量关系,并说明理由.
![](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/d718b208bce3e2778a466b2ed8d5312f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846bbe6e9646cae074a24c0dffc6d8f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b521ec6f3c547fea9a369c5d2eb12b66.png)
![](https://img.xkw.com/dksih/QBM/2019/10/29/2322278443393024/2322541476921344/STEM/81c81e6ed6ba49449f2349dd9ba1c863.png?resizew=244)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85bdcc2742be52cc80ba7dbe79f9a574.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)试写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
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解答题-证明题
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适中
(0.65)
【推荐2】如图,
、
是
的两条弦,
的延长线交
于点
,连结
、
,若
,则:
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961514823925760/2967721021726720/STEM/9398fa97-1209-4723-aa64-6cce616d1e2c.png?resizew=162)
(1)求证:
;
(2)当
时,求
;
(3)若
,且
面积为2,求
的面积.
![](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/3d97cdc586744d208b6f69c9813af977.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d824de2c1dcdcd4b9f7ab0982f0cee2d.png)
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961514823925760/2967721021726720/STEM/9398fa97-1209-4723-aa64-6cce616d1e2c.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70734a8e672376bb0bd1522e229f86a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5fc4ad65b723b6a8da4c8dac154e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/372629a8666de1e9bac3e7daadcac7b6.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,在平面直角坐标系中,点A的坐标为(1,0),以线段OA为边在第四象限内作等边三角形AOB,点C为x正半轴上一动点(OC>1),连接BC,以线段BC为边在第四象限内作等边△CBD,连接DA并延长,交y轴于点E.
(1)求证:△OBC≌△ABD;
(2)若以A,E,C为顶点的三角形是等腰三角形,求点C的坐标.
(1)求证:△OBC≌△ABD;
(2)若以A,E,C为顶点的三角形是等腰三角形,求点C的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/017ed784-6f9c-4a95-853b-e9cd14254371.png?resizew=143)
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解答题-作图题
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适中
(0.65)
【推荐2】如图,在等腰
中,
,点
分别为
上的点,将
沿直线
翻折,使点
落在点
处.
(1)用尺规作图作出直线
;(要求:尺规作图,保留作图痕迹,不写作法)
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/849187384a8fd398cccdf19db2245008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a51949f48ee8cf746851ba779b078e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d54431bbb28ebd98db5c1dc6083a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)用尺规作图作出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/22/cb2e9051-fb4e-4083-9ff5-1a7afd1fd499.png?resizew=147)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图,在四边形
中,
,
,
,
,
.点
从点
出发,以
秒的速度向点
运动;点
从点
出发,以
秒的速度向点
运动.规定其中一个点到达终点时,另一点也随之停止运动,设
点运动的时间为
秒.
,
两点同时出发.
①若
为何值时,四边形
为平行四边形?
②若
为何值时,四边形
为矩形?
(2)若
点先运动3秒后停止运动.此时
点从
点出发,到达
点后运动立即停止,则
为__________时,
为直角三角形(直接写出答案).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f89deb952f57f4b3fa4887b098b7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b79850d6b00a67110e77a33d1c46b5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ee5bd6f04872ef8d3d833d0e2056161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2589e4bb57ab742462dd935669dec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7125ed7d36982d0d4ab8902f1875a45e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6156798a008981f813f02c0d250fc74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91243b2b02ca6bb260acf4064887771e.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bddc68ed03fe7fd1fe30a5e626ba435.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129f1d6567bef09b00b7f37894e6dba7.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,点
为坐标原点,四边形
为矩形,边
、
分别在
轴、
轴上,
,
,
,
,且
、
满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/13/72d6ed27-4283-4333-adce-3b27d499a4fe.png?resizew=191)
(1)求
,
两点的坐标;
(2)把
沿
翻折,点
落在
处,线段
与
轴交于点
,求
的长;
(3)在平面内是否存在点
,使以
,
,
,
为顶点的四边形是平行四边形,若存在,请直接写出点
的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/132de9682ce9a412b7b517aa209726ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db7f3a97952ae4192dd2be17879a46d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07996b782cfca0bd5c2ac233ff83651c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10db645788952b950a6e276014dc33f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1158b401ca717391b6474d457721a6fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0b45f0fc9a4d2d763ec0cd9dbebe0f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/13/72d6ed27-4283-4333-adce-3b27d499a4fe.png?resizew=191)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4747ec744ffb25c74b664d5dfb48d45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
(3)在平面内是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60051144e33707f6aa51b2fe09925268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c2bb7be2e9410a16502268fd4c67be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7909220d1db380634534190b662ee0a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f015ed8e497b4394053ddd19683a98f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60051144e33707f6aa51b2fe09925268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60051144e33707f6aa51b2fe09925268.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,
、
是平行四边形
的对角线
上的两点,且
,
,连接
,
.
.
(2)连接
交
于点
,若
,
,求
的长.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17044102f37577b6ee347178945bb70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8157dbcda9476c3e5e113c3d3abc4c6.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5721071f34ec6a6c87c3a8a2b6e822ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/916893be8f4f4cf678ecadcef96b9fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
解答题-作图题
|
适中
(0.65)
【推荐2】如图,四边形
为平行四边形,且
.
![](https://img.xkw.com/dksih/QBM/2022/12/7/3125500535955456/3128033782505472/STEM/044371892c3649b69fa21834fe2e0944.png?resizew=265)
(1)请用尺规完成基本作图:作出
的角平分线交
于点E;(不写作法,保留作图痕迹)
(2)某数学学习小组在(1)所作的图形中,连接
,发现了
是一个直角三角形,并给出来如下证明,请你填空完成证明.
证明:∵
是
的角平分线,
∴
______
.
∵四边形
为平行四边形,
∴
,
∴
,
∴
,
∴
______.
∵
,
∴
,
∴
.
又∵
,
∴
______.
∴
.
∵
,
∴______
.
∴
.
∴
.
∴
.
∴
.
∴
为直角三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b929269c53a44907dba8ee298a0a522.png)
![](https://img.xkw.com/dksih/QBM/2022/12/7/3125500535955456/3128033782505472/STEM/044371892c3649b69fa21834fe2e0944.png?resizew=265)
(1)请用尺规完成基本作图:作出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)某数学学习小组在(1)所作的图形中,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0c32d9f3badb7e51233dd39a39fbb3.png)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6217ba54baf35aca59d9b89ded7367e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb30b46e8febce5d250db8835f0e967.png)
∵四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae68a08e3406327bce7d26aec3d61fba.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8289b804775f99d4e883697ed90c3a.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95165e75fd7ce2d553ae30298a453b22.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b929269c53a44907dba8ee298a0a522.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc91db43eea9ba6f29cb5719e26fa34.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c056a26c993ab806c603f063f78da923.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a80c41a824197e6003df61d77dd93ab.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f594898ac298fb28edc09796ad3ca899.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb409019fc9db614febd279db4c84f5.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
∴______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f54de38053cd21edf5eea4dbbd207f.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c443226d71fb6dcbee0afd07c4efd8.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d7f3d97bcec3543c5984ea10722cc8b.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99455c8d6ce770048d51710692efe88b.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd0c32d9f3badb7e51233dd39a39fbb3.png)
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