如图,直角梯形
中,
为
边上的中点,过
作
,交
边于
,
是
边上一点,且有
,
.
(1)求证:
;
(2)求证:
.
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589ddae20626f9aaac616d2a3b5d95bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32503fa12031f3af4faed3cc96c37ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b135c86d7494e610e43181ba3d84dd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/c2102d38-5bc4-47d4-bc7e-97c80dcfa27c.png?resizew=117)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df34369163e511f14028168cb0b21186.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f45ec607e76a2e7a83858f4b02146d96.png)
更新时间:2023-10-13 23:31:45
|
相似题推荐
【推荐1】综合与实践:如图1,正方形
的边长为2,在
中,
,
.当
时,
恰好经过
的中点
.
![](https://img.xkw.com/dksih/QBM/2021/5/12/2719673099329536/2727952990011392/STEM/553927f984f04e3eaab7f65aa891fc82.png?resizew=583)
(1)如图2,连接
,
,试判断四边形
的形状,并说明理由
(2)将图1中的
绕点
按顺时针方向旋转角度
,得到图3,连接
,
.求证:
,
.
(3)在(2)的旋转过程中,当
,
,
三点共线时,请直接写出线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a4242f85e3511a2032f684e47fe376.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f802ac3551129caadc79b2b60c9cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf75f0c59abe8883b8b5f595c5e6810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/2021/5/12/2719673099329536/2727952990011392/STEM/553927f984f04e3eaab7f65aa891fc82.png?resizew=583)
(1)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49404e6b19a342401a80d9feb1144605.png)
(2)将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a4242f85e3511a2032f684e47fe376.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c54ce139ae5d63691cac8a1ce5bbfe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c581dab991aeadf06d972e47673ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a598a35e6a4bfb3a5f08b55b70bdc3.png)
(3)在(2)的旋转过程中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/6aa2b5e09f8ec785c59900a529390a02.png)
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【推荐2】如图1,
为
的直径,
于点
,
,
与
交于点
.
.
(2)若
,求
的长.
(3)连结
,如图2,求证:
.
![](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/95d731624bc26be34d529f57b7c66530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a35c74cc181f1693e7720a3a562d1c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/768aeb82a126b38faeef9b95195746d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
(3)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6191db161af951c73dafb6ab454893b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2056fe512354783203ff844cea4a33b3.png)
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解题方法
【推荐3】已知,如图①,在
中,
,
,AC的垂直平分线分别交AD,AC,BC于点E,O,F,连接AF,CE.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/45bb7215-ec55-4563-ab30-43f3e8b7f166.png?resizew=673)
(1)求证:
;
(2)如图②,动点P,Q分别从A,C两点同时出发,沿
和
各边匀速运动一周.即点P自
停止,点Q自
停止.在运动过程中,
①已知点P的速度为每秒5cm,点Q的速度为每秒4cm,运动时间为t秒,当点P运动到FB上,点Q运动到DE上,且四边形APCQ是平行四边形时,求t的值;
②设点P,Q的运动路程分别为a,b,当四边形APCQ是平行四边形时,求a与b满足的数量关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df3b2901ad26337818f75e81448ebb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432043f79e122f291c47453013042704.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/45bb7215-ec55-4563-ab30-43f3e8b7f166.png?resizew=673)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ce1475f537b4ad21775bfaa16daa0c.png)
(2)如图②,动点P,Q分别从A,C两点同时出发,沿
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4139b091e9dc432b267ff68420c77de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee53bbeef279c5b54b255424d05706e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda7c1b5488fb0b4254a8df99004bdb4.png)
①已知点P的速度为每秒5cm,点Q的速度为每秒4cm,运动时间为t秒,当点P运动到FB上,点Q运动到DE上,且四边形APCQ是平行四边形时,求t的值;
②设点P,Q的运动路程分别为a,b,当四边形APCQ是平行四边形时,求a与b满足的数量关系式.
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解答题-问答题
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(0.4)
【推荐1】如图1,直线
与x轴交于点A,与y轴交于点B,点C与点A关于y轴对称.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/ec475088-424d-4276-a6c1-bddb6318a920.png?resizew=412)
(1)求直线
的函数表达式;
(2)设点M是x轴上的一个动点,过点M作y轴的平行线,交直线
于点P,交直线
于点Q,连接
.
①若
,请直接写出点P的坐标______;
②若
的面积为
,请直接写出点M的坐标______;
③若点K为线段
的中点,连接
,如图2,若在线段
上有一点F,满足
,请直接写出点F的坐标______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8e2fa0e4383590afe6d8f1d7aa8bdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/ec475088-424d-4276-a6c1-bddb6318a920.png?resizew=412)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)设点M是x轴上的一个动点,过点M作y轴的平行线,交直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ff267b4e9bc24c95c599d2b705671b.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a551505ae42b49904bab59b17012d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4700efcb84c4027ce7a50af0d5212fc.png)
③若点K为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1bd75fbe8bec72e27a3b3b6d48f138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eecc861fba3f5ed9f08815c223a2179e.png)
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【推荐2】在数学实践活动中,小王和小兰同学将直尺和直角三角板放置在平面直角坐标系中进行探究.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/65c573ad-a628-4639-96f8-bb35e2613b1b.png?resizew=602)
(1)如图1,点M、N在坐标轴上,点P在
的平分线
上,连接
,用直尺量得
,过点P作向坐标轴作垂线
,垂足分别为点E、F.求证:
;
(2)如图2,
为等腰直角三角形(
),点B在第二象限,
,若
, 求点B的坐标;
(3)如图3,
为等腰直角三角形(
),
,点C在y轴上,点B在第四象限且纵坐标为m,
交x轴于点
,若
平分
,探究m、n之间的数量关系.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/65c573ad-a628-4639-96f8-bb35e2613b1b.png?resizew=602)
(1)如图1,点M、N在坐标轴上,点P在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c77d91658d543ffc84e8a3dfbfb984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4acd79bb9fb06f7c806eb6e17e4b613.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e4cfe9e39e330d5c64eebff79d30394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3835e6398d18d162afebc92cd2ae9a.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6470a8f2500b3a7ca541a22819bf303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60992ca614466fa0ad8633f246fce3dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/640d05ae2b102bd73815702e7b83db7a.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6470a8f2500b3a7ca541a22819bf303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1555786aee1795f2a9a8950f9657550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4c84919344b587aff6d0a395803516d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
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【推荐1】如图,四边形
是正方形,点
在对角线
上,点
在边
上,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/78626a37-27d3-409e-9ba3-a1af340545f2.png?resizew=325)
(1)如图
,求证:
;
(2)如图
,求证:
;
(3)如图
,作
于
,连接
,若
,
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307df8bc3d86f576dbed099c402104df.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/78626a37-27d3-409e-9ba3-a1af340545f2.png?resizew=325)
(1)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9087d317b66712a2d176ec0a84f3ec49.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1c9ae241fd78126274c65e17990c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a83ca34d0b9c21e96a58c1dae049ff8.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c650fe55b7603f106c53ca2423451c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394e6e3e8347de96c46112a7d5eaef29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cc74983e9660ef048a36bda4b61a38f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdca1d03318f6a5d79c035a21f1c7132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
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名校
【推荐2】如图,在矩形
中,
,
,动点
从点
出发,沿边
,
向点
运动,
,
关于直线
的对称点分别为
,
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/e47b4ab2-ac67-4e7d-a9d5-689a061fd942.png?resizew=432)
(1)如图,当
在边
上且
时,证明:
;
(2)当
在
延长线上时,求
的长;
(3)当直线
恰好经过点
时,请直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/e47b4ab2-ac67-4e7d-a9d5-689a061fd942.png?resizew=432)
(1)如图,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aa9ef3ee8838c3e3f5ecdfd0c093418.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
(3)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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解答题-证明题
|
较难
(0.4)
【推荐3】如图,在矩形ABCD中,E是边AB上一点,BE=BC,EF⊥CD,垂足为F.将四边形CBEF绕点C顺时针旋转α(0°<α<90°),得到四边形CB'E'F′,B′E′所在的直线分别交直线BC于点G,交直线AD于点P,交CD于点K.E′F′所在的直线分别交直线BC于点H,交直线AD于点Q,连接B′F′交CD于点O.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/4df38107-0895-4517-a455-a0986f068222.png?resizew=500)
(1)如图1,求证:四边形BEFC是正方形;
(2)如图2,当点Q和点D重合时.
①求证:GC=DC;
②若OK=1,CO=2,求线段GP的长;
(3)如图3,若
交GP于点M,tan∠G=
,求
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/23/4df38107-0895-4517-a455-a0986f068222.png?resizew=500)
(1)如图1,求证:四边形BEFC是正方形;
(2)如图2,当点Q和点D重合时.
①求证:GC=DC;
②若OK=1,CO=2,求线段GP的长;
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de75a22264b9c08a5d5b4cacc8a9f8bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c06f1fa7768077b6665363b6813938.png)
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