如图,在平面直角坐标系
中,菱形
的对角线
经过原点
,与
交于点
轴于点
,点D的坐标
为反比例函数
的图象恰好经过
两点.
(1)求
的值及
所在直线的表达式;
(2)求证:
.
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6fe498c2068479981636c41465c9da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f092e8dafe8e057d21e915e20498111c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4cf40b6cf2051622c0a52e84710c138.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/26/f609d547-ca92-4768-9528-507ae04625fd.png?resizew=215)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b719ad25b547885ff04faa199aa969e.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b4dc110f8b6267b3d077a539c873bc.png)
更新时间:2020-01-21 17:29:17
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在平面直角坐标系中已知四边形
为菱形,且
.
(1)求过点
的反比例函数表达式;
(2)设直线l与(1)中所求函数图象相切,且与
轴,
轴的交点分别为
为坐标原点.求证:
的面积为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef51f44a02491da4c85c3f07abf191e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/23/24fc44fe-e8ee-48ce-b721-f085ec9a5aae.png?resizew=161)
(1)求过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线l与(1)中所求函数图象相切,且与
![](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/fd36104c7358ec5d86aa50b4b035642a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
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【推荐2】九年级某数学兴趣小组在学习了反比例函数的图象和性质后,进一步研究了函数
的图象与性质,其探究过程如下:
①列表;下表是
与
的几组对应值,其中
_______;
②描点:根据表中各组对应值
在平面直角坐标系中描出了各点;
③连线:用平滑的曲线顺次连接各点,画出了部分图象,请你把图象补充完整;
(2)通过观察图1,写出该函数的两条性质:
①___________________________________________________________;
②___________________________________________________________;
(3)①观察发现:如图2,若直线
交函数
的图象于
两点,连接
,过点
作
交
轴于点
,则
_______;
②探究思考:将①的直线
改为直线
,其他条件不变,则
_______;
③类比猜想:若直线
交函数
的图象于
两点,连接
,过点
作
交
轴于
,则
_______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad9049a7e95bb312336f08d9bf30f184.png)
①列表;下表是
![](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/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![]() | … | ![]() | ![]() | ![]() | ![]() | ![]() | 1 | 2 | 3 | … |
![]() | … | ![]() | 1 | 2 | 4 | 4 | 2 | ![]() | ![]() | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d9aa1d34d66a6876aa0566c8fc8b0a.png)
③连线:用平滑的曲线顺次连接各点,画出了部分图象,请你把图象补充完整;
(2)通过观察图1,写出该函数的两条性质:
①___________________________________________________________;
②___________________________________________________________;
(3)①观察发现:如图2,若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad9049a7e95bb312336f08d9bf30f184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b0f2c0352a94898281927fa8cb7a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab6679b256bb6ab61be17c4d6a0279f0.png)
②探究思考:将①的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55d1015c5a6d11f0ae3ae37be6bf5f60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b0f75e4cd8348a0587825af15394264.png)
③类比猜想:若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55d1015c5a6d11f0ae3ae37be6bf5f60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac79568c360dfcbce54a01655c7d0a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9b0f2c0352a94898281927fa8cb7a26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b0f75e4cd8348a0587825af15394264.png)
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解答题-证明题
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(0.65)
【推荐1】如图,已知
,以
为直径的
交边
于点
,
与
相切.
(1)若
,求证:
;
(2)点
是
上一点,且
,
两点在
的异侧.若
,
,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/15/f76d9888-eddb-4d00-8119-b061c4ccbf14.png?resizew=137)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1868c0afdec4296f01c3db4a07ce440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb6823a329628699619a39cde927510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23851c86d55187137a3e8d66538b2891.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
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【推荐2】数学中,把长与宽之比为
(或宽与长之比为
)的矩形称为黄金矩形.
思考解决下列问题:
(1)已知图1中黄金矩形
的长
,求
的长;
(2)黄金矩形有个奇妙的特性:把图1中的黄金矩形
,以
为边向矩形内作正方形
,则矩形
是否为黄金矩形,是,请予以证明;不是,请说明理由;
(3)黄金矩形使名画《蒙娜丽莎》显得特别和谐,专家分析画中布局如图2,其中最外面的矩形是黄金矩形,以黄金矩形的宽为边向矩形内部作正方形,由上小题知产生的小矩形为更小的黄金矩形,按此规律依次生成各黄金矩形,若图3中最大黄金矩形的长为
,则最小黄金矩形的长是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5569c257d122b7837b636d732033531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029d393bb07b7140905b85f550519de4.png)
思考解决下列问题:
(1)已知图1中黄金矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ddcd5435b39971f897210aa0b66a259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0cee0f36dc452e58086832c0152b641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)黄金矩形有个奇妙的特性:把图1中的黄金矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ddcd5435b39971f897210aa0b66a259.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/df333e02bc0f84f0c4d280a85cdd53c7.png)
(3)黄金矩形使名画《蒙娜丽莎》显得特别和谐,专家分析画中布局如图2,其中最外面的矩形是黄金矩形,以黄金矩形的宽为边向矩形内部作正方形,由上小题知产生的小矩形为更小的黄金矩形,按此规律依次生成各黄金矩形,若图3中最大黄金矩形的长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://img.xkw.com/dksih/QBM/2019/11/5/2327440021553152/2327822389731328/STEM/768320acc6654e198551fb77335c3c0b.png?resizew=301)
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【推荐1】如图,已知点
、
分别在
中的边
、
的延长线上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/24/e897bd2d-d2e4-407b-be13-bad32665883d.png?resizew=225)
(1)如果
,
,
,求
的长;
(2)如果
,
,
,过点
作
,垂足为点
,求
的长.
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c436f108fd4921dae15ecff19270237e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/24/e897bd2d-d2e4-407b-be13-bad32665883d.png?resizew=225)
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905c7dbd4a489c232f4c7ceb05479ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a19338598965bb3856cdd0236bbf694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b39e39696825a18c8cd16c351029a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af69ccd4919a013c5a5b46ebe5cfc0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86afd4f2661a9208c4e600e318408777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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解答题-证明题
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适中
(0.65)
【推荐2】已知:四边形ABCD是正方形,点E是BC边的中点,点F在边AB上,联结DE、EF.
(1)如图1,如果tan∠BEF=
,求证:EF⊥DE;
(2)如图2,如果tan∠BEF=
,求证:∠DEF=3∠CDE.
(1)如图1,如果tan∠BEF=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)如图2,如果tan∠BEF=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712447702564864/2714657041309696/STEM/e45bee2a55ed46fa92716baeebb2011a.png?resizew=492)
您最近一年使用:0次