已知
中,
,
,
,点D是
上一点,连接
.
,连接
,且
,延长线段
,
交于点M,则
= ,
.
(2)如图2,过点C作
,且
,连接
.
①已知点G是线段
的中点,连接
,若
,求
的度数;
②如图3,过点A作
,垂足为点H,交
于点N,若
,直接写出
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce7f6d278f2ef7a193b7eed7be6b3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27557ad8d2618454755309fad45cb69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cff41783418c5e11f70c71ee2e137566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddeb9efb488b31ae67efd29efd56b3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/000c462db45121f901ba2cc9f6846793.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3540f9ee01814140d08dc661bac52305.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1672bf7cfa9a741651889f41855f6f3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20e1e439ae12873ab41008c0e2049f9.png)
(2)如图2,过点C作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c819c9a5f8d0a3f8b774d18dcd478cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e0eda7e3020735776b9e1232b583263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
①已知点G是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8946331b0a9d86e1a9c78797f3021455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7ea03277f8408fabe5b327cc34838f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafdcc559885163e7863ae837adf29e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e5cf35876e8718b12f01c739430503f.png)
②如图3,过点A作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f54c1b05b07754ccf40bcb393c81e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9171484a68c84cad91e4f2233392f600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb852a681f5de38cad77b8ed8c6a6fea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4cb4069a2e1e90d1a9c4979ad09ca2.png)
更新时间:2024-06-09 15:20:58
|
相似题推荐
解答题-问答题
|
较难
(0.4)
【推荐1】如图,
中,
,
是
的中点.点
从
出发,以
的速度沿
匀速向点
运动,点
同时以
的速度从
出发,沿
匀速向点
运动,其中一个动点到达端点时,另一个动点也随之停止运动,过点
作
的垂线,交
于点
,连接
.设它们运动的时间为
秒(
).
![](https://img.xkw.com/dksih/QBM/2022/3/21/2940930079350784/2945272084496384/STEM/f7d50cb7-0a79-4044-a473-d37f11684473.png?resizew=369)
(1)当
时,
,求
的值;
(2)当
时,以点
为顶点的四边形是平行四边形,求
的值;
(3)当
时,是否存在某个时间
,使
是直角三角形?若存在,请求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1480ec22d3654b776c45a853ec0b19eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb3bc1b8d855f5bee788722b6224fe99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](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/2b9174c3b1324cf81098e42e0480bcc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc3f0491e753eed7b26deafcdb0ad2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://img.xkw.com/dksih/QBM/2022/3/21/2940930079350784/2945272084496384/STEM/f7d50cb7-0a79-4044-a473-d37f11684473.png?resizew=369)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0478e1bd89705da857992a6371b59af1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d57a747acda6d5c93b2569d72ddff8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65092140faebed69b87e5a134703407c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】已知
,
,点C为射线
上一动点(不与点B重合),
关于
的轴对称图形为
.
(1)如图1,当点D在射线
上时,求证:四边形
是菱形;
(2)如图2,当点D在射线
,
之间时,若点G为射线
上一点,点C为
的中点,连接
交
于点M,
.
①求证:
为直角三角形;
②求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf7dc43a39738e3e2a0b819be505c6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc3322a2ad9a95bdc9fc576a7a158d4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644f63756fe9251e65cc14e1ce9723d4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/16/6b0be3d2-1466-4cb1-8b34-e52c419b0e56.png?resizew=334)
(1)如图1,当点D在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)如图2,当点D在射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.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/b5e4fb1bc9a5ab812427d3cea8655fae.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d11746005a0e806f2d27f89e3d9e9c2.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】几何学的产生,源于人们对土地测量的需要,后来由实际问题抽象成为数学问题,初中数学常见的几何模型有很多,通过整理归纳,可以从这些基本模型中找到其所蕴含的规律.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/5/713f3322-a422-4af7-8f4c-72329bbe34b1.png?resizew=475)
【提出问题】
如图1,△ABC和△ADE均为等腰直角三角形,∠ABC=∠ADE=90°,△ADE绕点A旋转,连接BD、EC,小明通过探究得到∠ABD与∠BCE的大小存在某种数量关系,具体探究过程如下.
(1)【探究问题】小明先将上述问题“特值化”,如图1,令AB=1,AD=
,∠ABD=100°,则可证明△ABD和△ACE相似,进而可求得∠BCE的度数.请你帮助小明完成解答过程.
(2)【解决问题】将问题“一般化”,如图2,在△ADE绕点A旋转过程中,∠ABD与∠BCE满足的数量关系为 .
(3)【拓展应用】如图3,过线段AB的端点B作射线
,Rt△ADE的直角顶点D在射线BM上运动,连接BE,若AB=4,3AD=4DE,则BE的最小值为 .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/5/713f3322-a422-4af7-8f4c-72329bbe34b1.png?resizew=475)
【提出问题】
如图1,△ABC和△ADE均为等腰直角三角形,∠ABC=∠ADE=90°,△ADE绕点A旋转,连接BD、EC,小明通过探究得到∠ABD与∠BCE的大小存在某种数量关系,具体探究过程如下.
(1)【探究问题】小明先将上述问题“特值化”,如图1,令AB=1,AD=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(2)【解决问题】将问题“一般化”,如图2,在△ADE绕点A旋转过程中,∠ABD与∠BCE满足的数量关系为 .
(3)【拓展应用】如图3,过线段AB的端点B作射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1c3e1e0e7938fcce6a0ecd70c14b480.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】已知点
、
分别是正方形
的边
、
上的点,
,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/1b3f21dd-2a5f-4d94-a971-c075f6d6ecf4.png?resizew=588)
(1)如图1,
,点
是边
的中点,点
是线段
的中点,连接
,求出线段
的长度;
(2)如图2,连接
、
,点
是线段
的中点,连接
,判断
与
之间的关系,并进行证明;
(3)如图3,
,连接
、
,点
是线段
的中点,连接
,点
为
的中点,点
为
的中点,连接
,当点
为
的三等分点时,直接写出
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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac679f877d3e3b3acef1f1f8e3654b4b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/13/1b3f21dd-2a5f-4d94-a971-c075f6d6ecf4.png?resizew=588)
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
(3)如图3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐1】已知平行四边形
中,
,点P是对角线
上一动点,作
,射线
交射线
于点E,联结
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/be6eb8fa-dde4-4b22-af52-f0b174627884.png?resizew=395)
(1)如图1,当点E与点A重合时,证明:
;
(2)如图2,点E在
的延长线上,当
时,求
的长;
(3)当
是以
为底的等腰三角形时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e32bf8770d493743ecdf9443b34ccdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a86a9f55b3bff40c9b2ae47a066e3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/be6eb8fa-dde4-4b22-af52-f0b174627884.png?resizew=395)
(1)如图1,当点E与点A重合时,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bcc6731c8a8a198fb21bda51c85921f.png)
(2)如图2,点E在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3931b2f1576fb293b5a5c94a89eaa2e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729684f958ad60b8e905fe1e1da53c03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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解答题-证明题
|
较难
(0.4)
【推荐2】(1)如图1,
和
是等腰直角三角形,
,点C在
上,点D在线段
延长线上,连接
,
.线段
与
的数量关系为______;
(2)如图2,将图1中的
绕点O顺时针旋转
(
)第一问的结论是否仍然成立;如果成立,证明你的结论,若不成立,说明理由.
(3)如图3,若
,点C是线段
外一动点,
,连接
,
①若将
绕点C逆时针旋转
得到
,连接
,则
的最大值______;
②若以
为斜边作
,(B、C、D三点按顺时针排列),
,连接
,当
时,直接写出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d3c378b1118d331d30b63fc587b270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如图2,将图1中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/708d48b595c17d4dccf9b4086d7e664e.png)
(3)如图3,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2ae98eb223b4fe33e53e9d3ba4cc40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
①若将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
②若以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35209f869a13d3690a28cfec689c5c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42074af1b0909e9dba0c626ea131a770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e2b1f4b41f62feb6ee651f9bbb9db48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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