【基础复习】如图1,将
绕着点A逆时针旋转一定角度,得到
,连接
,
,请写出你发现的结论________.(至少写出两个,不再添加辅助线)
【类比探究】如图2,在正方形
中,F是
上的一点.连接
,将
绕点A顺时针旋转
,设F点旋转后的对应点为E,连接
,补全旋转后的图形.判断
的形状,并说明理由.
【拓展拔高】如图3,在正方形
的内部,作
,交
于点E,交
于点F,连接
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c021993da445858448d368df42554c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
【类比探究】如图2,在正方形
![](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/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441dec590b47adc3678a291a3ec89a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
【拓展拔高】如图3,在正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9af98a1a048b1e2f7c71e83c33498c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/db71726a-01a8-48b5-b812-eceadfd90f6c.png?resizew=472)
更新时间:2023-12-28 12:10:46
|
相似题推荐
解答题-证明题
|
较难
(0.4)
【推荐1】已知:在
外分别以
,
为边作
与
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/10/a08f80fd-3af7-46cb-a7ba-5d7253002ee9.png?resizew=416)
(1)如图1,
与
分别是以
,
为斜边的等腰直角三角形,连接
,以
为直角边构造
,且
,连接
,
,
.
求证:
①
;
②四边形
是平行四边形.
(2)如图2,在
外分别以
,
为斜边作
与
,并使
,取BC的中点D,连接DE,EF请求出
的值及
的度数.
(3)如图3,在
外分别以
,
为底边作等腰三角形
和等腰三角形
,并使
与
之和为
,取
的中点D,连接
,
,当
,
,
,请用含a,b的代数式直接写出
的值,用含α的代数式直接表示
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0986ba5fcba791e3052488480ae175ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84fac7b2ba42c31be84e844415406851.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/10/a08f80fd-3af7-46cb-a7ba-5d7253002ee9.png?resizew=416)
(1)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0986ba5fcba791e3052488480ae175ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84fac7b2ba42c31be84e844415406851.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e45b672655606f91d86bd37e0a2747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb40d27691c83993dffbd713a18077e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999a995a6d07c561ce64e8952994160a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11667abcb2759f301391b9850352be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9171484a68c84cad91e4f2233392f600.png)
求证:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85b8a658ec3fe01803fce6c5810b5a.png)
②四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89f3cd70eb830808f2e4cfaf7318a680.png)
(2)如图2,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cec4464b5efa55e9b33a677d983667e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03e70b7b6a06f9924ad0173db9cce091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd1d6dcb48e35b6ee125b306c2f9d86a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b942540f5329b8531868993a54b434e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d7e138a524b349fdcce1c4de933aa0.png)
(3)如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7526fe1f1fcea600e7f28fa9808600ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745d613f4c21104c6c2cae961dac0f6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41fb0e3d1966056998b2a2071a943a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fe05847c651fc905b80b7325533a16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a0387fc1258f31e44a10068c0ccfd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18f15d76bbb10f12d237c568487ee41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d00f7c4ab95176650df9c685ddb8e6df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30d145406c1f057aaffce76eba11ad6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b942540f5329b8531868993a54b434e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d7e138a524b349fdcce1c4de933aa0.png)
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解答题-计算题
|
较难
(0.4)
名校
【推荐2】在△ABC中,BD平分∠ABC,CE平分∠ACB,BD和CE交于点O,其中令∠BAC=x,∠BOC=y.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/303560d7-5ef2-4b08-ae5d-27591df16b83.png?resizew=507)
(1)【计算求值】如图1,①如果x=50°,则y= ;②如果y=130°,则x= .
(2)【猜想证明】如图2请你根据(1)中【计算求值】的心得猜想写出y与x的关系式为y= ,并请你说明你的猜想的正确性.
(3)【解决问题】如图3,某校园内有一个如图2所示的三角形的小花园,花园中有两条小路,BD和CE为三角形的角平分线,交点为点O,在O处建有一个自动浇水器,需要在BC边取一处接水口F,经过测量得知∠BAC=120°,
,BC﹣BE﹣CD=170米,请你求出水管OF至少要多长?(结果取整数)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/303560d7-5ef2-4b08-ae5d-27591df16b83.png?resizew=507)
(1)【计算求值】如图1,①如果x=50°,则y= ;②如果y=130°,则x= .
(2)【猜想证明】如图2请你根据(1)中【计算求值】的心得猜想写出y与x的关系式为y= ,并请你说明你的猜想的正确性.
(3)【解决问题】如图3,某校园内有一个如图2所示的三角形的小花园,花园中有两条小路,BD和CE为三角形的角平分线,交点为点O,在O处建有一个自动浇水器,需要在BC边取一处接水口F,经过测量得知∠BAC=120°,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8aa20f4f99f4ec3c66d01d7e411b2e.png)
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解答题-问答题
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较难
(0.4)
【推荐1】如图①,在矩形
中,
cm,
,点E从点A出发,沿射线
以a(cm/s)的速度匀速移动,连接DE,过点E作
与射线
相交于点F,作矩形
,连接
,设点E移动的时间为t(s),△CDE的面积为S(cm2).S与t的函数关系如图②所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/c4f18a34-0494-44db-88f4-c1bea9e59d61.png?resizew=393)
(1)a=___________;
(2)求矩形
面积的最小值;
(3)当
为等腰三角形时,直接写出t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce552d6e4e8bca4d93e5cb01d8685600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a626eb07074f222d52c129b275e173d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6040540e19b36e11b106d3898695d140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/c4f18a34-0494-44db-88f4-c1bea9e59d61.png?resizew=393)
(1)a=___________;
(2)求矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316546643a3ba478e7c10a912900edfe.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图①,在平面直角坐标系中,直线
:
与直线
:
相交于点
,点
是直线
上的动点,过点
作
于点
,点
的坐标为
,连接
,
.设点
的纵坐标为
,
的面积为
.
(1)当
时,求点
的坐标;
(2)
关于
的函数解析式为
,其图象如图②所示,结合图①、②的信息,求出
与
的值;
(3)在直线
上是否存在点
,使得
,若存在,请求出此时点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd2d246f0850db73fe2e6b1e26eb549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fed700b7a3ab2ee7fbae12507033af9.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/18/d18a1a77-cdcf-48e0-979a-bdd9c7aae788.png?resizew=327)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af32344ec7bcea7a976ab7ec7e620710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】如图,正方形ABCD的对角线相交于点O,点O也是正方形A′B′C′O的一个顶点,如果两个正方形的边长都等于1,那么正方形A′B′C′O绕顶点O转动,两个正方形重叠部分的面积大小有什么规律?请说明理由.
![](https://img.xkw.com/dksih/QBM/2019/2/18/2143355108179968/2144938063790080/STEM/a4cc1ea711f8485aa31b035efac2eee5.png?resizew=97)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
【推荐2】如图,在正方形
中,
为
上一点,
为
中点,点
关于
的对称点为
,
交
于点
,交
于点
,连接
,
.
(1)求证:
;
(2)求
的大小;
(3)若
平分
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/9/979f599a-be6e-4e50-a94d-20ec377846c6.jpg?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d38f194843f348e838fcabd923a4892.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/758d387ba75d002e1f85c196a795db9a.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e663220a66eff19da6a71e46b397db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53142e9213d7d107e13bf44560bb7153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a1de4c052c4701d43322e96ac411b9.png)
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解答题-问答题
|
较难
(0.4)
【推荐1】如图①,在
中,
,
,
,点D,E分别是边
的中点,连接
,将
绕点C顺时针方向旋转,记旋转角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/fb536c5a-7b69-48f3-b2c9-b51da2678a3c.png?resizew=465)
(1)问题发现
当
时,
.
(2)拓展探究
试判断:当
时,
的大小有无变化?请仅就图②的情况给出证明.
(3)问题解决
(i)当
旋转至A、D、E三点共线时,如图③,计算
的值是多少?
(ii)根据图③的结论,请直接写出图④中,线段
的长,
_______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5dfc2edd439281ad211a3736f9484a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f850c705372b8a85489505da53239fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/fb536c5a-7b69-48f3-b2c9-b51da2678a3c.png?resizew=465)
(1)问题发现
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7e8c4e8015bc1a44a89460e1dc0d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce24b781c66474602b5ba6627241531.png)
(2)拓展探究
试判断:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b9fe3abff2653fc00ca4e98901169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625000a942ec1b76a1176284be6d6520.png)
(3)问题解决
(i)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f850c705372b8a85489505da53239fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(ii)根据图③的结论,请直接写出图④中,线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978d92edf0c4c1ef8620c17df75d35e.png)
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解答题-问答题
|
较难
(0.4)
【推荐2】定义:在平面直角坐标系
中,若在函数图象W上存在一点M,绕原点顺时针旋转
后的对应点N(点N与M不重合)仍在此函数图象W上,则称这个函数为“凡尔赛函数”,其中点M称为这个函数的“凡尔赛点”
(1)函数①
,②
,③
,其中是“凡尔赛函数”的是 ;(填序号)
(2)若一次函数
是“凡尔赛函数”,点
(m为整数)是这个函数的“凡尔赛点”,求k的值;
(3)若点
是二次函数
(其中a,b,c为常数,
)的“凡尔赛点”,点B为A的“后凡尔赛点”,由点A、B、C、D四点构成的四边形面积记为S,求S的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
(1)函数①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85410ff00c81839ff9a64bf86dc36f5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
(2)若一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ebce8b2a915356ed39f36c5bad2ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82aaa597a5aa6176863eda3fdf83e181.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ca979687ffb2214e747525635a6912c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35a815e123ef5a7adc448a9c8aff37b7.png)
您最近一年使用:0次