解题方法
1 . 在一次数学社团活动中,小晨同学所在的小组把两个二次项系数之和为
,对称轴相同,且图象与x轴交点也相同的二次函数,命名为“和合对称二次函数”,对应图象命名为“和合对称抛物线”,并把两个函数图象上横坐标相同的对应点称之为“和合点”,针对该构想,小展同学用二次函数
作为其中一个函数(标记该函数图象交
轴于原点
及点
)做了有关研究,请你帮他解答.
【特例感知】(1)当
时,如图,抛物线
上的点
关于与之对应的“和合对称抛物线”图像
的“和合点”分别为
,
.如下表:
②画图:在图中描出表中对应的“和合点”,再用平滑的曲线依次连接各点,得到“和合对称抛物线”图象
.
【初步探讨】(2)①当
时,若抛物线
的顶点为点
,点
对应的“和合点”为点
,则由点
、
四点所围成的四边形的面积为______;
②在同一平面直角坐标系中,当
取不同值时,通过画图发现与二次函数
对应的“和合对称抛物线”图象中,存在一条抛物线
,其顶点的横、纵坐标恰好互为相反数,请求出抛物线
的解析式.
【进阶探究】(3)若抛物线
及与它对应的“和合对称抛物线”
与直线
有且只有三个交点,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3bed8dfa15bbe3e2e244588c54c26e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
【特例感知】(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e94f16d5ed858699bfea5039a7bf8ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451a22f8a81f0d6157eae92860fa9e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8bfe00fbc071b7031e541757ecbed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf90af48c665ee801c05cc55914b8fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e90fce7961764ba612ea6a918795f534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
… | ![]() | ![]() | ![]() | ![]() | ![]() | … |
… | ![]() | ![]() | ![]() | ![]() | ![]() | … |
②画图:在图中描出表中对应的“和合点”,再用平滑的曲线依次连接各点,得到“和合对称抛物线”图象
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf90af48c665ee801c05cc55914b8fd.png)
【初步探讨】(2)①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed39f5aca78934fb383402433fe549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/3e4e38d67f9a3aa070df50a003053cf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
②在同一平面直角坐标系中,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3bed8dfa15bbe3e2e244588c54c26e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf90af48c665ee801c05cc55914b8fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf90af48c665ee801c05cc55914b8fd.png)
【进阶探究】(3)若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e338e0dc7a5eb21fbff996fd4c1bbed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcf90af48c665ee801c05cc55914b8fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4d12362d4b8dd25813953e1c5a94b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2卷引用:数学(辽宁卷)-【试题猜想】2024年中考考前最后一卷
2 . 如图,圆柱体的母线长为2,
是上底的直径.一只蚂蚁从下底面的点A处出发爬行到上底面的点C处.设沿圆柱体侧面由A处爬行到C处的最短路径长为
,沿母线
与上底面直径
形成的折线段爬行到C处的路径的长为
.当圆柱体底面半径r变化时,为比较
与
的大小,记
,则d是r的二次函数,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](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/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee1f899fbfb468d9fe484016d7761e4.png)
A.该函数的图象都在r轴上方 | B.该函数的图象的对称轴为![]() |
C.当![]() ![]() | D.当![]() ![]() |
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2卷引用:2024年山东省潍坊市潍城区数学一模模拟试题
3 . 某厂家特制了一批高脚杯,分为男士杯和女士杯(如图1),相关信息如下:
根据以上素材内容,尝试求解以下问题:
(1)求抛物线
和抛物线
的解析式;
(2)当杯子水平放置及杯内液体静止时,若男士杯中的液体与女士杯中的液体深度均为4cm,求两者液体最上层表面圆面积之差;(结果保留
)
(3)当杯子水平放置及杯内液体静止时,若男士杯中的液体与女士杯中的液体深度相等,两者液体最上层表面圆面积相差
,求杯中液体的深度.
素材 | 内容 |
素材1 | 如图1,这种高脚杯从下往上分为三部分: 杯托,杯脚,杯体.杯托为一个圆,水平放置时候,杯脚经过杯托圆心,并垂直任意直径,杯体的水平横截面都为圆,这些圆的圆心都在杯脚所在直线上. |
素材2 | 图2坐标系中,特制男士杯可以看作由线段![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
素材3 | 已知,图2坐标系中,![]() ![]() ![]() |
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422210c777ac0d625bbd81cc7601bf9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c288e6de7e470011569e2b7f870779.png)
(2)当杯子水平放置及杯内液体静止时,若男士杯中的液体与女士杯中的液体深度均为4cm,求两者液体最上层表面圆面积之差;(结果保留
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
(3)当杯子水平放置及杯内液体静止时,若男士杯中的液体与女士杯中的液体深度相等,两者液体最上层表面圆面积相差
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d22823b399c69346be0bc0b9dd2b8c2.png)
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4 . 如图,是一块菱形新型平面材料
,
,
,点E在
上,且
垂直于
,先沿着
切开材料,然后在四边形
内切割出一块矩形,且矩形相邻两边落在
,
上,一个顶点落在
边上.设边
上矩形的边长为
,矩形的面积为
.有下列结论:①y与x之间的函数关系式为:
;②当
时,切割出矩形后,四边形
剩余的面积为
;③若切割出的矩形材料用于某种生产时,售价为
元/
,则当
时,出售此块矩形材料的总价最大,最大值为
元.其中,正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/695525d00319665b1ad0d01717979523.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9889e15ad926dfc0dfa2a2fc33e53dd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc1cbcd6d00f0c36bad8254297d9f33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee3160fce05b551569b8c7b5de6dd8b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d740004cfdade4c185f722dadc27e15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a8c94103cbd283ac3cfceaa42af133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ff06692c025b869a7bcdcff15dca9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bfad3f7e65188bcf7f62ea5acdbf4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e03c716ab81f50eee011e7b659e5bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8f58755aee89fb2cf72ba518dcee2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ce13774b09ff2edddaf21a072cf60a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fc1419fe4cc7fc0e9624ffd036f3d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9c198bddd2c3d495cdb556f67404417.png)
A.0 | B.1 | C.2 | D.3 |
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5 . 如图,
是抛物线
在第四象限的图象上一点,过点
分别向
轴和
轴作垂线,垂足分别为
、
,则四边形
周长的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73ec2e51e8bf082ec95b5ce8348de68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e902eb263971b466d0fcd91c56b453.png)
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名校
6 . 问题探究:
(1)如图1,在四边形
中,
,
,
,
.点F,E分别在
,
边上,连接
与
交于点O,且
.若
,
.求
的度数和线段
的长度.
问题解决:
(2)如图2,在矩形
花园的规划中,
米,
米,点E在
上,点F在
上,
,连接
,
交于点O,点P为
的中点,以
为直径修建一个圆形的水池养锦鲤,供游客欣赏.为了节约费用,要求这个圆形的水池面积最小,请求出水池面积的最小值.
(1)如图1,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dda26560447cafbd6439ba5d8ad39b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90bd1ffa355edcdc023b5a6b47ca7526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
问题解决:
(2)如图2,在矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc37bedc5ccd9b87cfd90e3a62f80ba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e5463fa46b911865fc2aa92387a0d9.png)
![](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/f1d0d6dc13cf6b6d1a0e0c1d55ad0ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
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7 . 如图,一农户要建一个矩形猪舍,猪舍的一边利用长为
的住房墙,另外三边用
长的建筑材料围成,为方便进出,在垂直于住房墙的一边留一个
宽的门.
?
(2)猪舍面积最大时,所围矩形猪舍的长、宽分别为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e978c77cb0d7eff794447241e9829867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146ea9ed5176797da555a70bbe9602c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f328ba89c0a92a4447788b65571f7aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ce8a83405c52b2984f4ac323369d3fd.png)
(2)猪舍面积最大时,所围矩形猪舍的长、宽分别为多少?
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8 . 如图,要围一个矩形菜园
,其中一边
是墙,且
的长不能超过
,其余的三边
用篱笆,且这三边的和为
,有下列结论:①
的长可以为
;②
的长有两个不同的值满足菜园
面积为
;③菜园
面积的最大值为
.其中,正确结论是________ .
![](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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17cf43f666b86f28fc8e1b918584b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5262192e49cf903ee094457dbc250f96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c758c27bec97c234d1d818c40f3d3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e17ee14bd91bfff409c06fd434f6745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb92c9032804326713c7b4feea53f40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d30414777b108d2fb1cdabd09c265a30.png)
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2卷引用:2024年山东省聊城市阳谷县九年级中考一模数学模拟试题
9 . 如图,在钝角
中(
为钝角),
,
,
,在其内部作一个矩形
,使矩形的一边
在边
上,顶点M,P分别在边
,
上.设矩形的一边
,矩形的面积为y,则y与x的函数关系式可用函数图象表示为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c406e7d1e7977dd5b30ef81cfdc8e8d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db492efc6bfe199d47633e6d5946ad57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3171b3d11c6f4619e189677345357508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/ef0409dcc992e45d68b10278f941b0c9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 如图是某校田径运动场的示意图其中
和
为直线跑道,两端为半圆形跑道.
,其中
,试计算矩形
内部操场的面积.
(2)①如果田径运动场的总长为
,要使矩形
内部操场的面积最大,直线跑道应设计为多长?操场的最大面积是多少?
②小明测量发现,学校田径运动场的总长为
,直线跑道
,请判断这与①中的计算结果是否一致,并给出一种可能的原因.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f05ba29eb90358e2211e1f7ba6423fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be29324ebcc6b6a7edba4df222b22e38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)①如果田径运动场的总长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2351df22087d65be69519770be21c20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
②小明测量发现,学校田径运动场的总长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2351df22087d65be69519770be21c20f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a60ca7f872e0cf2a9aad2e9e0819fa.png)
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