如图1,在正方形ABCD中,点E、F分别是BC、AB上的点,且CE=BF,连接DE,过点E作EG⊥DE,使EG=DE,连接FG、FC.
(1)判断:FG与CE的位置关系是 ,BE、CD、FG之间的数量关系为 .
(2)如图2,若点E,F分别是边CB,BA延长线上的点,其它条件不变,(1)中结论是否仍然成立?请作出判断并给予证明;
(3)如图3,若点E、F分别是边BC、AB延长线上的点,正方形ABCD的边长为12,GE=13,其他条件不变,请直接写出四边形FGEB的面积.
(1)判断:FG与CE的位置关系是 ,BE、CD、FG之间的数量关系为 .
(2)如图2,若点E,F分别是边CB,BA延长线上的点,其它条件不变,(1)中结论是否仍然成立?请作出判断并给予证明;
(3)如图3,若点E、F分别是边BC、AB延长线上的点,正方形ABCD的边长为12,GE=13,其他条件不变,请直接写出四边形FGEB的面积.
![](https://img.xkw.com/dksih/QBM/2021/8/3/2777991169597440/2781306959978496/STEM/4b5d8b73d75d4bd1b59ee3c4ca5e79cb.png?resizew=448)
更新时间:2021-08-07 23:26:24
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【推荐1】如图,过△DBE点D作直线l∥BE,以点B为圆心,BD为半径作弧交直线l于点A.
(1)求证:∠BAD=∠DBE;
(2)在AD上截取AC=BE,求证:四边形BEDC是等腰梯形.
(1)求证:∠BAD=∠DBE;
(2)在AD上截取AC=BE,求证:四边形BEDC是等腰梯形.
![](https://img.xkw.com/dksih/QBM/2019/5/22/2209076762820608/2209729547059200/STEM/001628f077aa4bb294137b039fdd9178.png?resizew=252)
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【推荐2】如图1,△ACB和△ECD都是等腰直角三角形,∠ACB=∠ECD=90°连结AE、BD.
![](https://img.xkw.com/dksih/QBM/2020/8/10/2524677078540288/2526285502398464/STEM/42d5250d40594cfa84f2aa994f26cf32.png?resizew=94)
(1)线段AE和线段BD的数量关系为 ,位置关系为 ;
(2)如图2,将△ECD绕点C顺时针旋转
(
).
①(1)中的结论是否成立?若成立,利用图2证明;若不成立,说明理由;
② △ECD绕点C顺时针旋转,当点D落在线段AB的中点时,四边形AECD为那种特殊四边?请在图3中画出图形,写出结论,并说明理由;
③△ECD绕点C顺时针旋转,当点E落在线段AB的中点时,四边形ACDE为那种特殊四边?直接写出结论,不用说明理由.
![](https://img.xkw.com/dksih/QBM/2020/8/10/2524677078540288/2526285502398464/STEM/6926251a83a64cdeb3ef9dd7ab233c91.png?resizew=128)
![](https://img.xkw.com/dksih/QBM/2020/8/10/2524677078540288/2526285502398464/STEM/b75a138ae38a46848559175bc21f4d84.png?resizew=145)
![](https://img.xkw.com/dksih/QBM/2020/8/10/2524677078540288/2526285502398464/STEM/34f1edf68df24453b933e8a469e31db4.png?resizew=104)
![](https://img.xkw.com/dksih/QBM/2020/8/10/2524677078540288/2526285502398464/STEM/42d5250d40594cfa84f2aa994f26cf32.png?resizew=94)
(1)线段AE和线段BD的数量关系为 ,位置关系为 ;
(2)如图2,将△ECD绕点C顺时针旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783d872617eed2bbd474035156b6caaf.png)
①(1)中的结论是否成立?若成立,利用图2证明;若不成立,说明理由;
② △ECD绕点C顺时针旋转,当点D落在线段AB的中点时,四边形AECD为那种特殊四边?请在图3中画出图形,写出结论,并说明理由;
③△ECD绕点C顺时针旋转,当点E落在线段AB的中点时,四边形ACDE为那种特殊四边?直接写出结论,不用说明理由.
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【推荐1】已知一次函数图像与直线
平行,且过点
.
(2)求该一次函数与坐标轴围成的三角形的周长 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f663113d04234101e161946bfbfe6234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0b2a929250e835ae150332d80a3ea0a.png)
(2)求该一次函数与坐标轴围成的三角形的
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【推荐2】如图1,在矩形
中,对角线
,
相交于点O,过点A,B分别作
,
的平行线,相交于点E.
是菱形;
(2)若四边形
的面积是24,
,求矩形
的周长;
(3)如图2,在(2)的条件下,点P是线段
上的一动点,连接
,作点B关于直线
的对称点Q,若点P从点B开始向右运动了6个单位,求点Q运动的轨迹的长.
![](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/d40b319212a7e7528b053e1c7097e966.png)
![](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/e20e9d6c7e003d1a312b722e5e7fd4c5.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20e9d6c7e003d1a312b722e5e7fd4c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)如图2,在(2)的条件下,点P是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
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【推荐1】如图,已知
,
分别是平行四边形
的边
,
上的点,且
.
是平行四边形;
(2)当
,且四边形
是菱形时,求
的长.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d378fea1ac2f8eb93d62aea14c5a6059.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b977f9880c3acc912c36aa3e2df56c9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e93419817201de01138468c38bdd1ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b977f9880c3acc912c36aa3e2df56c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
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【推荐2】如图,在
中,
,中线
,
交于点
,
,
分别是
,
的中点,连接
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/5d20966e-a646-44f7-bb65-b8087e0c356a.png?resizew=146)
(1)求证:四边形
是平行四边形.
(2)当
,
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/5d20966e-a646-44f7-bb65-b8087e0c356a.png?resizew=146)
(1)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eeb94acdc3de00655e6e29d5372da09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/695406a73460d1c4f3d98d97ed7a742e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐1】已知正方形
与正方形
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/25/2902288925196288/2902841487425536/STEM/b4c91fb6-22fa-4a71-a626-134e97f6691c.png?resizew=463)
(1)如图1,若点
和点
重合,点
在线段
上,点
在线段
的延长线上,连接
、
、
,将阴影部分三角形
的面积记作
,则
(用含有
、
的代数式表示).
(2)如图2,若点
与点
重合,点
在线段
上,点
在线段
的延长线上,连接
、
、
,将阴影部分三角形
的面积记作
,则
(用含有
、
的代数式表示).
(3)如图3,若将正方形
沿正方形
的边
所在直线平移,使得点
、
在线段
上(点
不与点
重合、点
不与点
重合),连接
、
、
,设
,将阴影部分三角形
的面积记作
,则
(用含有
、
、
的代数式表示).
(4)如图4,若将正方形
沿正方形
的边
所在直线平移,使得点
、
在
的延长线上,连接
、
、
,设
,将阴影部分三角形
的面积记作
,则
(用含有
、
、
的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d42e97eee705d164e6ac6de9ecd6d1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02a30526b144361b1bfab34b9704c7b.png)
![](https://img.xkw.com/dksih/QBM/2022/1/25/2902288925196288/2902841487425536/STEM/b4c91fb6-22fa-4a71-a626-134e97f6691c.png?resizew=463)
(1)如图1,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f374baaa5a31893355f913fcd249e456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)如图2,若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f374baaa5a31893355f913fcd249e456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)如图3,若将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/73465a1f9aa03481295bf6bd3c6903ac.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6916f5928b337aa8c6bc8f5795487bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f374baaa5a31893355f913fcd249e456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(4)如图4,若将正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6916f5928b337aa8c6bc8f5795487bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f374baaa5a31893355f913fcd249e456.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447a9718a502491b47072ce013c26a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】如图,在正方形
中,点
,
分别在
,
上,且
,
与
相交于点
,
是
的中点,连接
.
![](https://img.xkw.com/dksih/QBM/2023/10/13/3345254777643008/3360788277043200/STEM/2f7fbe6ea62b487e8b4b6244d880ee0f.png?resizew=134)
(1)
与
之间有怎样的关系?请说明理由.
(2)若
,
,求
的长.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff56ea00ca90825f3d95809de24f639.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://img.xkw.com/dksih/QBM/2023/10/13/3345254777643008/3360788277043200/STEM/2f7fbe6ea62b487e8b4b6244d880ee0f.png?resizew=134)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09ff1ab7c0b83696618a8fbea1d2fae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
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