解题方法
1 . 某街道规划建一座口袋公园.如图所示,公园由扇形
区域和三角形
区域组成.其中
三点共线,扇形半径
为30米.规划口袋公园建成后,扇形
区域将作为花草展示区,三角形
区域作为亲水平台区,两个区域的所有边界修建休闲步道.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/b1bb7ad3-ee63-4f58-8211-0d81d9483eaa.png?resizew=167)
(1)若
,
,求休闲步道总长(精确到米);
(2)若
,在前期民意调查时发现,绝大部分街道居民对亲水平台区更感兴趣.请你根据民意调查情况,从该区域面积最大或周长最长的视角出发,选择其中一个方案,设计三角形
的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed01d1ff5a7f21a68fb3a1e5c7f393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf126cfed85fa9b7720ec6f7b0008dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d322efb382f7cc7a9bb242bcd706d649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed01d1ff5a7f21a68fb3a1e5c7f393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf126cfed85fa9b7720ec6f7b0008dc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/b1bb7ad3-ee63-4f58-8211-0d81d9483eaa.png?resizew=167)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3925e45d83a5383e492cdb1666493cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/718db7266fcd1f56a5992783235ab720.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7df59d622d4b375f2e811020babf06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf126cfed85fa9b7720ec6f7b0008dc.png)
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2 . 如图所示为某小区在草坪上活动区域的平面示意图,在
四个点分别建造了供老年人活动的器械.
四个点所围成的四边形即为老年人的活动区域.为了便于老年人在草坪上行走,小区建造了
,
,
,
,
,
六条步行道,其中
,
,
,
.设
,
,
为四边形
的面积.
(1)若
,求
的值:
(2)求
的最大值,并求
取到最大值时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.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/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7f0401adb20a8b873d6997b2f6a236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf10d92f20501e19d25f6f4159aab89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/597ce705d3a2fe04d29de9e81ec6250d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f55b8836b41be612a52ca9caf97006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/4e8ccf15-630c-4b51-a584-c6a17b8834e6.png?resizew=167)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7087fc7d2ed3e68b3cb309114afde9aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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2023-11-14更新
|
483次组卷
|
3卷引用:上海市建平中学2024届高三上学期期中数学试题
名校
解题方法
3 . 下列四个命题:①若
,则
是第二象限角或第三象限角;②
且
是
为第三象限角的充要条件;③若
,则角
和角
的终边相同;④若
,则
.其中真命题的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddea0134685ce58a7a850ac8aa52aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0926a517312b8c73f8428ee683e60a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bdfc1eef2fde598b0a1ecb4282698e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5426b6d35bef718963baa87e24131c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c61cfbfd3bf888856b7dc9b2a84c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/116a4f1c8b51d1993e6d7c054e2ed5d7.png)
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4 . 公元263年,刘徽首创了用圆的内接正多边形的面积来逼近圆面积的方法,算得
值为3.14,我国称这种方法为割圆术,直到1200年后,西方人才找到了类似的方法,后人为纪念刘徽的贡献,将3.14称为徽率.我们作单位圆的外切和内接正
边形
,记外切正
边形周长的一半为
,内接正
边形周长的一半为
.通过计算容易得到:
(其中
是正
边形的一条边所对圆心角的一半)
(1)求
的通项公式;
(2)求证:对于任意正整数
依次成等差数列;
(3)试问对任意正整数
是否能构成等比数列?说明你的理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbbc0cf9164007ddd298dd2236703f2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bbccb799ae7eb992b25b2426173ed36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbbc0cf9164007ddd298dd2236703f2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbbc0cf9164007ddd298dd2236703f2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96936fc2a366e6a8d1dfae54322d5d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92ffa8be5a02790c6161c56b8e90db64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbbc0cf9164007ddd298dd2236703f2f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)求证:对于任意正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac64c640ccd57708681eada27a8fa6d.png)
(3)试问对任意正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e42bf4d8449d427c1f5f252db0f298.png)
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2023-07-21更新
|
382次组卷
|
3卷引用:上海师范大学附属中学2022-2023学年高一下学期期末数学试题
名校
解题方法
5 . 已知正三角形
面积为
,D为边
上一点,且
.射线
沿与
夹角为α的方向射到边
上的点E,经
反射交边
于点F.射线
经边
反射交
于点G.若点G在线段
上(不包括端点C、D),则α的取值范围为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7cb903441d8e6b4448c3d5d7959d9d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa44b161ccef3dd736cdb2d78e78ddcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/49b50357a6545cae8348e3059312f520.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/9d78abbad68bbbf12af10cd40ef4c353.png)
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解题方法
6 . 已知圆
.圆D的圆心D在y轴上且与圆C外切.圆D与y轴交于A、B两点,点P为
.
(1)若点D坐标为
,求
的正切值;
(2)当点D在y轴上运动时,求
的正切值的最大值;
(3)在x轴上是否存在定点Q,当圆D在y轴上运动时,
是定值?如果存在,求出点Q坐标;如果不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/553b19083c401c2fd2486c6297a92d14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcd0aebdd8bd688d108834747009f5.png)
(1)若点D坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0e705301752424a492f6277ed7774e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
(2)当点D在y轴上运动时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
(3)在x轴上是否存在定点Q,当圆D在y轴上运动时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c7bbe0ac1c88c9d35978a7184ba553.png)
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7 . 定义:若曲线C1和曲线C2有公共点P,且在P处的切线相同,则称C1与C2在点P处相切.
(1)设
.若曲线
与曲线
在点P处相切,求m的值;
(2)设
,若圆M:
与曲线
在点Q(Q在第一象限)处相切,求b的最小值;
(3)若函数
是定义在R上的连续可导函数,导函数为
,且满足
和
都恒成立.是否存在点P,使得曲线
和曲线y=1在点P处相切?证明你的结论.
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e3eea6e9e68deb9799e4492f596c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c13ca144c2fe2e7a2a42cb25785ec4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b466f39f2a89f9acc35986098b1a31b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f786a5701dc1a8a015e8843c3360151b.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d0c99ddd028f0bc3b1d64924ff0f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a401146416b25488b8b21501e5d9ab4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cda01771ec500241e3b99d0b63ea3a8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf2dd9defca825ed67709b3b67d2b4e.png)
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2023-05-28更新
|
554次组卷
|
3卷引用:上海市华东师范大学第二附属中学2022-2023学年高二下学期期末数学试题
2023·上海浦东新·模拟预测
名校
解题方法
8 . 设
,
.以点
为焦点,直线
为准线的抛物线
交抛物线
于
两点.则直线
的斜率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd9218a657b17654c5d757a6f7dee9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9db6b54803f4e65157f6be0e8427f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09488419c9cef00b39a107ac81e706a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09c7fc8e284e4aafd93a630d50a53930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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9 . “得地率”是指可供人活动的区域的占地面积与总占地面积之比.“得地率”越高,也就意味着人们可活动的区域更大,因此在设计活动场地时,通常会将“得地率”作为一个重要的指标进行考虑.上海某大型购物商场欲将地下一层的一块半圆形空地改建为亲子乐园,建造一个供亲子游玩的海洋球池和两个供人们休息和娱乐,且大小完全相同的休息区.除海洋球池和休息区外的剩余空地全部用气垫筑起“高墙”,以保护亲子乐园中的人们.如图所示,设半圆形空地的圆心为
,半径为
,
为直径,矩形海洋球池
的顶点
在
上,顶点
在半圆的圆周上.矩形休息区
和
的顶点
在
上,顶点
在半圆的圆周上,顶点
分别在线段
上.已知
,设
,其中
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/af12af0c-395f-40b9-be6f-8965c23e30df.png?resizew=438)
(1)求当
时该亲子乐园可供人活动的区域面积
,并求出此时的“得地率”(结果精确到
);
(2)求当
为多大时,该亲子乐园的“得地率”最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc8cedba8cf78fb20381c72e9b5f6b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1da2078b8e4cb44d7147917152d601e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7826f255c338257bb731c64c6f12ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c25cddba1adc4e38324a56dc50376a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46c696ff5f123a482bae81cf9a1b570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d777a41834c51955d719bd68e7bd45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11db4b9921a9fe4d5c03b17bafc852fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5a531329748ceebf20280835a4e60f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/af12af0c-395f-40b9-be6f-8965c23e30df.png?resizew=438)
(1)求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905dd10639c9fef5ef8d66a124756140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edb1e0c3e2fb29b0b35d51d22a5710d.png)
(2)求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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10 . 对于函数
及给定的实数
,若存在正实数t使得函数
在区间
和
上同为增函数或同为减函数,则称函数
为区间
上的
函数;
(1)已知
,请指出函数
是否为区间[0,1]上的
函数(不需要说明理由);
(2)已知
,且函数
是区间
上 的
函数,请写出t的所有取值,并说明理由;
(3)若函数
既是区间
上的
函数又是区间
上的
函数,当α、β取遍所有可取的值时,求出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c1b52a92fd3dc776c43fa5ff1e3be9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa38149578f22f9e1e2bd481dade72de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4776c85b79df196f606d3ebf3697fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40af4dded142fd56ff3dc505a3751d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c1b52a92fd3dc776c43fa5ff1e3be9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4776c85b79df196f606d3ebf3697fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3c22079495aace7a6e1a6c7d36f6d9.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42acea836df9ca7c237b52df778c21a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1396f59915eb245c39a974fc778e9cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d4235095bdb902078a2a515af9e3d2.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c599ff76117b8493cb817c03329786a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4776c85b79df196f606d3ebf3697fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3c22079495aace7a6e1a6c7d36f6d9.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab4f92366ae95454b50ff6219155900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92de12037343c43634104d23fa4e08c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882427a7e4ab8a9d62922051b707049a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dd53169f0e89a6bccdbc4603bc1cff6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd12996c1ba5de97286e5bb2dc1e90f.png)
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