如图1,抛物线
:
经过点
、
两点,
是其顶点,将抛物线
绕点
旋转
,得到新的抛物线
.
(1)求抛物线
的函数解析式及顶点
的坐标;
(2)如图2,直线
:
经过点
,
是抛物线
上的一点,设
点的横坐标为
(
),连接
并延长,交抛物线
于点
,交直线
于点
,若
,求
的值;
(3)如图3,在(2)的条件下,连接
、
,在直线
下方的抛物线
上是否存在点
,使得
?若存在,求出点
的横坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53be61cd85ec86aabd164cae0265246b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/993769b494e12c21dff0ee7c53a4a49f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/097e8a6a6de675f44d3bef88bb37375c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e210795a966bd5dc1293479ab1988b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/5bd77dcb-64b0-4e68-8e32-9e292450aea0.png?resizew=616)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(2)如图2,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba59ebf623eb6fdf67a61c2170466c0.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85feaa0f6ce7f2926a66ebb864c57003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d31725602db470db4fe2c889b3e3837c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)如图3,在(2)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcb50538f1ad273327f82747c1dd7fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
23-24九年级上·全国·期末 查看更多[1]
(已下线)期末压轴专题分类02(必刷50题23种题型专项训练)-2023-2024学年九年级数学上学期期末考点大串讲(北师大版)
更新时间:2024-01-20 19:01:25
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相似题推荐
解答题-问答题
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真题
【推荐1】如图1,点A为抛物线C1:
的顶点,点B的坐标为(1,0),直线AB交抛物线C1于另一点C.
(1)求点C的坐标;
(2)如图1,平行于y轴的直线x=3交直线AB于点D,交抛物线C1于点E,平行于y轴的直线x=a交直线AB于F,交抛物线C1于G,若FG:DE=4:3,求a的值;
(3)如图2,将抛物线C1向下平移m(m>0)个单位得到抛物线C2,且抛物线C2的顶点为点P,交x轴于点M,交射线BC于点N,NQ⊥x轴于点Q,当NP平分∠MNQ时,求m的值.
![](https://img.xkw.com/dksih/QBM/2012/7/10/1573436836610048/1573436923150336/STEM/fc836766-8462-48ae-a5a1-26c3b2250b20.png?resizew=460)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f17faea138e0ea57e848f7e3d33683c7.png)
(1)求点C的坐标;
(2)如图1,平行于y轴的直线x=3交直线AB于点D,交抛物线C1于点E,平行于y轴的直线x=a交直线AB于F,交抛物线C1于G,若FG:DE=4:3,求a的值;
(3)如图2,将抛物线C1向下平移m(m>0)个单位得到抛物线C2,且抛物线C2的顶点为点P,交x轴于点M,交射线BC于点N,NQ⊥x轴于点Q,当NP平分∠MNQ时,求m的值.
![](https://img.xkw.com/dksih/QBM/2012/7/10/1573436836610048/1573436923150336/STEM/fc836766-8462-48ae-a5a1-26c3b2250b20.png?resizew=460)
图1 图2
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【推荐2】已知在直角坐标系中,抛物线
与
轴交于
两点(点
在点
的左侧)与
轴交于点
,点
在该抛物线上,点
,点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/980e8187-3ce0-4bcd-9f9f-a20272bd6bcf.png?resizew=563)
(1)求抛物线的解析式;
(2)如图(1),点
在直线
上方的抛物线上,求
面积的最大值;
(3)如图(2),在
轴的正半轴上有一动点
,当
的外接圆与过抛物线顶点
的直线
相切时,求点
的坐标;
(4)如图(3),在直线
上有一点
,坐标平面内有一点
,若四边形
是正方形,请直接写出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158f5a581695399f6ffdf65110dec692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2be6c8965198df9430b5f3966263fe6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/30/980e8187-3ce0-4bcd-9f9f-a20272bd6bcf.png?resizew=563)
(1)求抛物线的解析式;
(2)如图(1),点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b996e05aecd15a1416b8475c73c02c3c.png)
(3)如图(2),在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2da5ec61847f0b607242437ce5be3ff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2580401b7ffa117c9ec3a635e34203df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(4)如图(3),在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcbfdc3ce5fcd7f1e73bd8fac2b06854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐1】如图,在△ABC中,
,△ABC的两条角平分线BF、CE相交于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/1191a4a6-f8af-496b-ad39-3c706e461f62.png?resizew=156)
(1)
度.
(2)如图,平行四边形ABCD中,对角线
,在AD上截取AH=AB,连接BH交AC于点F,过点C作CE平分
交BH于点G.若
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/56ce440a-ec20-42d7-be48-1c0e3dc88508.png?resizew=212)
①求
的值.
②求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25daa6a88cd90fe8e5c532f21511ed91.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/1191a4a6-f8af-496b-ad39-3c706e461f62.png?resizew=156)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cd3c7ab70588e0e593db914ccc67d6.png)
(2)如图,平行四边形ABCD中,对角线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822ba132ca9dd0d4a050659aef3c9b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b968ee7efdb7727c62457a8b58b14ece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c484f79c69b61882f2b56f14514400f7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/56ce440a-ec20-42d7-be48-1c0e3dc88508.png?resizew=212)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7610b825747815dad099e6f2f842bd29.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f1aa12d8ed1e57c406136102e37d767.png)
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【推荐2】如图,在平面直角坐标系中,抛物线
过点
,且交x轴于点
,B两点,交y轴于点C.
(2)点P是直线
上方抛物线上的一动点,过点P作
于点D,过点P作y轴的平行线交直线
于点E,求
周长的最大值及此时点P的坐标;
(3)在(2)中
周长取得最大值的条件下,将该抛物线沿射线
方向平移
个单位长度,点M为平移后的抛物线的对称轴上一点.在平面内确定一点N,使得以点A,P,M,N为顶点的四边形是菱形,写出所有符合条件的点N的坐标,并写出求解点N的坐标的其中一种情况的过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0d44326c214c7a5ecc3068a29ec96f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e88ebfb5c0d6cce558b515be06404d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
(2)点P是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65334978b0519b379910dfc4acf8344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
(3)在(2)中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
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解题方法
【推荐1】在直角
中,
,
,点D是
外一点,连接
,以
为边作等边
.
上,
交
于点M,且
平分
,若
,求
的面积;
(2)如图2,连接
并延长至点E,使得
,连接
、
、
,证明:
;
(3)如图3,旋转
使得
落在
的角平分线上,M、N分别是射线
、
上的动点,且始终满足
,连接
,若
,请直接写出
的面积最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26fdd8e57562ba94e10e7f1d770826d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93d92c3a236f1440d884ee00359a869f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
(2)如图2,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb2b9e822daec4a5459ee44e6e9fbd36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a82b9920118a886123e208da8daa049c.png)
(3)如图3,旋转
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9149c116c750a53b286e543391503fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e64872851e6f9c502cfc3b783149e8bb.png)
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【推荐2】如图,顶点为
的二次函数图象经过原点
,点P在该图象上,
交其对称轴l于点M,点M、N关于点A对称,连接
,
.
(2)若点P的坐标是
,求
的面积;
(3)当点P在对称轴l左侧的二次函数图象上运动时,请解答下面问题:
①求证:
;
②若
为直角三角形,请直接写出所有符合条件的点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56801f4cfc34a5f57cc7ad3b8dd74902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2c84e7b41a841a230ed5f8a42309aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
(2)若点P的坐标是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7e96cd766187a0b56fb6a324675d611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f02c6f05016c03cbf6f92d8807afb2d6.png)
(3)当点P在对称轴l左侧的二次函数图象上运动时,请解答下面问题:
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e03556c6c394f041c722c73f4caaabd.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f02c6f05016c03cbf6f92d8807afb2d6.png)
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解答题-证明题
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困难
(0.15)
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解题方法
【推荐1】如图1,在直角坐标系中,O是坐标原点,点A在y轴正半轴上,二次函数y=ax2+
x+c的图象F交x轴于B、C两点,交y轴于M点,其中B(﹣3,0),M(0,﹣1).已知AM=BC.
(2)证明:在抛物线F上存在点D,使A、B、C、D四点连接而成的四边形恰好是平行四边形,并请求出直线BD的解析式;
(3)在(2)的条件下,设直线l过D且l⊥BD,分别交直线BA、BC于不同的P、Q两点,AC、BD相交于N,求
的值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
(2)证明:在抛物线F上存在点D,使A、B、C、D四点连接而成的四边形恰好是平行四边形,并请求出直线BD的解析式;
(3)在(2)的条件下,设直线l过D且l⊥BD,分别交直线BA、BC于不同的P、Q两点,AC、BD相交于N,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/382ddc897323ee54c55f7e735e6de4d1.png)
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解答题-问答题
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困难
(0.15)
【推荐2】如图,已知二次函数y=ax2+bx+c(a<0,c>0)与x轴交于点A、B,与y轴交于点C,且以AB为直径的圆经过点C.
(1)若点A(﹣2,0),点B(8,0),求ac的值;
(2)若点A(x1,0),B(x2,0),试探索ac是否为定值?若是,求出这个定值;若不是,请说明理由.
(3)若点D是圆与抛物线的交点(D与A、B、C不重合),在(1)的条件下,坐标轴上是否存在一点P,使得以P、B、C为顶点的三角形与△CBD相似?若存在,请直接写出点P坐标;若不存在,请说明理由.
(1)若点A(﹣2,0),点B(8,0),求ac的值;
(2)若点A(x1,0),B(x2,0),试探索ac是否为定值?若是,求出这个定值;若不是,请说明理由.
(3)若点D是圆与抛物线的交点(D与A、B、C不重合),在(1)的条件下,坐标轴上是否存在一点P,使得以P、B、C为顶点的三角形与△CBD相似?若存在,请直接写出点P坐标;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2018/3/15/1902633587335168/1904196184268800/STEM/5d4e177be9a44e8aafd93a8e830d8183.png?resizew=290)
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