如图:已知直线
与x轴、y轴分别相交于点A、B,
是
的角平分线,点E是线段
上的一个动点(不与点O,A重合),过点E作
,交线段
于点Q,交线段
于点F,设
,
.
(2)求y与x的函数关系式,并写出定义域;
(3)连接
,如果
垂直平分
,那么直线
上是否存在点P,使得
的面积等于
的面积的2倍?若存在,求出此时点P的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daae7120db4f80c760c043f7ae42f1fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de4a54cc7818be87a239f6de5f5d05b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c30f73c718bde8352055a14987fc15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0319a8d5c884572329d120e5cd48a513.png)
(2)求y与x的函数关系式,并写出定义域;
(3)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bf7264407abc7b2e3b2ef4baa13da06.png)
更新时间:2024-04-18 10:24:13
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相似题推荐
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【推荐1】已知抛物线
,直线
与
轴交于点
,与
轴交于点
.
(1)求
、
的坐标;
(2)若抛物线与
轴交于
两点,且抛物线的顶点
落在直线
上,求
的面积;
(3)若线段
与抛物线有且只有一个公共点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cb2fb39023efe3eb3e3cae187c4bb2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/501a6d50c937729c8d0f02b2b62a0ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(2)若抛物线与
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/501a6d50c937729c8d0f02b2b62a0ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(3)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】如图,直线
与x轴、y轴分别交于点
和点
,直线
与直线
交于点
,平行于y轴的直线m从原点O出发,以每秒
个单位长度的速度沿x轴向右平移,到
点时停止.直线m交线段
、
于点
、
,以
为斜边向左侧作等腰
,设
与
重叠部分的面积为
(平方单位),直线m的运动时间为t(秒).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/7bf503bd-d5ac-443a-b0b5-08600d01c26e.png?resizew=553)
(1)填空:
_______,
______;
(2)填空:动点
的坐标为(t,_____),
______(用含t的代数式表示);
(3)当点
落在
轴上时,求
的值.
(4)求S与t的函数关系式并写出自变量的取值范围;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4c4a6d65908676eba74e68a8160e987.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/fc73fe95b5c8db905a5f74334b89c8a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f73fbc2f33d3402cd96a776a376d9835.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1792f3a7e53643bbdeeb469131e55f0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff36ac07c45c8d03cf3b7d8739c517ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/18/7bf503bd-d5ac-443a-b0b5-08600d01c26e.png?resizew=553)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a548e8a2e2205f2faa87e25180a083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a00d6c5d80f95848a61f305e6bc394.png)
(2)填空:动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
(3)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(4)求S与t的函数关系式并写出自变量的取值范围;
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【推荐1】如图,点A(1,0)、B(4,0)、M(5,3).动点P从A点出发,沿x轴以每秒1个单位的速度向右移动,过点P的直线l:y= -x+b也随之移动.设移动时间为t秒.
(1)当t=1时,求直线l的解析式.
(2)若直线l与线段BM有公共点,求t的取值范围.
(3)当点M关于直线l的对称点落在坐标轴上时,求t的值.
(1)当t=1时,求直线l的解析式.
(2)若直线l与线段BM有公共点,求t的取值范围.
(3)当点M关于直线l的对称点落在坐标轴上时,求t的值.
![](https://img.xkw.com/dksih/QBM/2020/6/10/2481427700670464/2484403068534784/STEM/dc23ecab02d74aa5a9a5471b9a46f154.png?resizew=213)
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【推荐2】如图,在平面直角坐标系内,已知点A(0,6),点B(8,0).动点P从A开始在线段AO上以每秒1个单位长度的速度向点O移动,同时动点Q从点B开始在线段BA上以每秒2个单位长度的速度向点A移动,设点P,Q移动的时间为t秒.
(1)求直线AB的解析式;
(2)当t为何值时,△APQ与△AOB相似,并求出此时点P的坐标.
(1)求直线AB的解析式;
(2)当t为何值时,△APQ与△AOB相似,并求出此时点P的坐标.
![](https://img.xkw.com/dksih/QBM/2018/3/28/1911996779708416/1914956121219072/STEM/8520c3626fae45edb5521d7e1469cdd0.png?resizew=117)
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【推荐3】定义:在平面直角坐标系中,若P,Q为某个四边形相邻的两个顶点,且该四边形的两条对角线分别与x轴,y轴平行或重合,则称该四边形为点P,Q的“奇美四边形”.图1为点P,Q的“奇美四边形”的一个示意图.设点
,点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5612d598e27ac2ce0ab89fb63538bf.png)
![](https://img.xkw.com/dksih/QBM/2021/3/31/2689574882975744/2689730556542976/STEM/fdc79b97-3399-49b0-842b-f796b8f944b9.png)
【初步尝试】(1)若
,在图2网格中画出点A,B的一个“奇美四边形”,并记作:“奇美四边形”
;
【深入探究】:(2)①若(1)中得到的“奇美四边形”
,满足
,
.求证:“奇美四边形”
是菱形;
②若点A,B的“奇美四边形”为矩形,求直线
的函数解析式;
【拓展应用】:(3)已知点
,在线段
上存在点N,平面内存在一点M,使点M,N的“奇美四边形”为矩形,且点B到直线
的距离始终为
,请直接写出b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115a0c87ac14dbb770c95d74d6e26073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5612d598e27ac2ce0ab89fb63538bf.png)
![](https://img.xkw.com/dksih/QBM/2021/3/31/2689574882975744/2689730556542976/STEM/fdc79b97-3399-49b0-842b-f796b8f944b9.png)
【初步尝试】(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcdb7a488910743dc5c63afb394b87e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
【深入探究】:(2)①若(1)中得到的“奇美四边形”
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb27272b4eb9ed057dd3b4d40697e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729d5cb74bb927aa549ce596a35b26b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
②若点A,B的“奇美四边形”为矩形,求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
【拓展应用】:(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e6975f591732cb9758fe76a2e12557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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【推荐1】(1)如图1,在
中,
,
边上的垂直平分线
交
于点D,交
于点E,连接
,
将
分成两个角,且
,求
的度数.
(2)如图2,
中,
、
的三等分线交于点E、D,若
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce7f6d278f2ef7a193b7eed7be6b3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c9d120f194183358b94b99c4376e402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
(2)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/756eb9a840789a7b4b265aa5b2d2958a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6aecc788824453d80546bf649c077fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
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【推荐2】如图:在△ABC 中,∠BAC=110°,AC=AB,射线 AD、AE 的夹角为 55°,过点 B 作BF⊥AD 于点 F,直线 BF 交 AE 于点 G,连接 CG.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/947a8144-7dd5-415b-86c8-1422c53c7eee.png?resizew=464)
(1)如图 1,若射线 AD、AE 都在∠BAC 的内部,且点 B 与点 B′关于 AD 对称,求证:CG=B'G;
(2)如图 2,若射线 AD 在∠BAC 的内部,射线 AE 在∠BAC 的外部,其他条件不变,求证:CG=BG﹣2GF;
(3)如图 3,若射线 AD、AE 都在∠BAC 的外部,其他条件不变,若 CG=
GF,AF=4,S△ABG=12,求 BF 的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/28/947a8144-7dd5-415b-86c8-1422c53c7eee.png?resizew=464)
(1)如图 1,若射线 AD、AE 都在∠BAC 的内部,且点 B 与点 B′关于 AD 对称,求证:CG=B'G;
(2)如图 2,若射线 AD 在∠BAC 的内部,射线 AE 在∠BAC 的外部,其他条件不变,求证:CG=BG﹣2GF;
(3)如图 3,若射线 AD、AE 都在∠BAC 的外部,其他条件不变,若 CG=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ebe74c278122d1bcde32f534bed13ec.png)
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【推荐1】折纸是我国传统的民间艺术,幸运星、纸飞机、千纸鹤、密信等折纸活动在生活中都广为流传,通过折纸我们既可以得到许多美丽的图形,同时折纸的过程还蕴含着丰富的数学知识,下面就让我们带着数学的眼光来探究一下有关纸片的折叠问题.
,将纸片沿线段AB折叠(如图②).如果长方形纸片
,
,求重叠部分
的面积;
(2)折纸2:如图③,已知矩形纸片
,点E为边
上一点,将
沿着直线
折叠,使点C的对应点F落在边
上.小明想要在边
上找出点E,他的作法如下:
i)以点B为圆心,以
长为半径画弧,交
于点F;
ii)作
的平分线与
交于点E.
请问若按上述作法,所得的点E是否符合要求?请证明你的结论;
(3)折线3:如图④,在等腰
中,
,
.动点M,N分别在两腰
上(M不与A,B重合,N不与A,C重合),且
.将
沿
所在的直线折叠,使点A的对应点为P.设
的长为x,
与等腰
重叠部分的面积为y.
①求y与x之间的函数关系式;
②试求
与等腰
重叠部分的面积的最大值,并求出此时
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df3b2901ad26337818f75e81448ebb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da2b024e5926973d8e69d466b9c0e94a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)折纸2:如图③,已知矩形纸片
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
i)以点B为圆心,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
ii)作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e99c17d72c203b50802f19d4731545.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
请问若按上述作法,所得的点E是否符合要求?请证明你的结论;
(3)折线3:如图④,在等腰
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0bbc68f2a65aea126b6e0d2c1081037.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545764505bb00578a870c5e39493a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c1dc52a8ba9f389800eb92dbd145bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①求y与x之间的函数关系式;
②试求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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解答题-问答题
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【推荐2】在一次数学课外活动中,智慧小组用“30-60-90°”的三角板玩起了拼图,如图,小智用两块一模一样的三角板拼出了一个平行四边形ABCD,小慧将一块更大的“30-60-90°”的三角板放置在小智同学的平行四边形上,其中大三角形60°角的顶点与C重合,一条直角边与AB交于点E,斜边与AD交于点F.
![](https://img.xkw.com/dksih/QBM/2021/3/22/2683221933244416/2683954199724032/STEM/e7ecceb4-e5d1-4bb7-969f-241eb6bf2ab1.png)
(1)基本常识:如图,
________;
(2)尝试探究:小智发现DF的长与AE、BE有关,若AE=2,BE=3,请你求DF的长;
(3)深入探究:小慧发现AE+2AF=
AC,试判断小慧的结论是否正确,并说明理由.
![](https://img.xkw.com/dksih/QBM/2021/3/22/2683221933244416/2683954199724032/STEM/e7ecceb4-e5d1-4bb7-969f-241eb6bf2ab1.png)
(1)基本常识:如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced48dad01ef2e4ca59650b5e9bb69ab.png)
(2)尝试探究:小智发现DF的长与AE、BE有关,若AE=2,BE=3,请你求DF的长;
(3)深入探究:小慧发现AE+2AF=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
您最近一年使用:0次