1 . 如图,矩形
的顶点A,C分别在x轴和y轴上,点B的坐标为
,反比例函数
(
),的图象经过
的中点D,且与
交于点E,连接
.
(1)求反比例函数的表达式及点E的坐标;
(2)点F是
边上一点,若
,求直线
的解析式;
(3)在(2)的条件下,若点P是反比例函数
的图象上的一点,若
的面积恰好等于矩形
的面积,求P点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3654254401fc902c3cb4912969f21f88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/8b4e6821-2acd-4bd9-9ab4-6fe2fe4c833f.png?resizew=195)
(1)求反比例函数的表达式及点E的坐标;
(2)点F是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2d4bcbc8ec69e22554ef04bdf01d22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2319a01218514917e446dfc807a625ff.png)
(3)在(2)的条件下,若点P是反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9510caac8a3fd09196323308e835ed1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0936e532862712045365cb3f63fced9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
您最近一年使用:0次
2023-06-08更新
|
142次组卷
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7卷引用:广东省河源市连平县大湖中学2021-2022学年九年级数学下学期期中测试卷
2 . 在平面直角坐标系
中,对于点
和点
,给出如下定义:若
,则称点Q为点P的限变点,例如:点
的限变点的坐标是
,点
的限变点的坐标是
.
(1)①点
的限变点的坐标是________;
②以下三个选项中的点是反比例函数
图象上某一个点的限变点的是( )
A.
B.
C.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf82e0452bad610360cb5257797e7ac6.png)
(2)若点P在一次函数
的图象上,请在下图平面直角坐标系中,画出点P的限变点Q的函数图象,并根据图象
点Q的纵坐标
的取值范围为________.
(3)我国著名数学家华罗庚曾说过:“数形结合百般好,隔裂分家万事休”.若点P在关于x的二次函数
的图象上,其限变点Q的纵坐标
的取值范围是
或
,其中
,令
,求s关于t的函数解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f1ed91787aece4f9f5feba5d5419ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd9fd9ff16fbf0861c2be162b6ad74e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ba1aa62f35ee38e0a2172dba6c22b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6591228ff6071963f143bf9e752a089.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6591228ff6071963f143bf9e752a089.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b497c80241ee01758c8b8ddb2c4c35b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd115be4cebf1b98290c803bd1d4e5fb.png)
(1)①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549ef8b93a2d3f62aa688ce09d76e411.png)
②以下三个选项中的点是反比例函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef854dfcbba9b7dedc1bc52f6332b011.png)
A.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d754c7913703076116ef6a2963e3cf06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9d51b51352854f7a88f7f3619ba5be3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf82e0452bad610360cb5257797e7ac6.png)
(2)若点P在一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f040ff0ee2ccc5d11f4f77434af41ac7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c470aaacdedff0a598430d96979d5416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0a621a4886d7682be536a9b3638728.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/9/cd7e8b8b-ba4a-4ab1-b0cd-afe4cba424f1.png?resizew=251)
(3)我国著名数学家华罗庚曾说过:“数形结合百般好,隔裂分家万事休”.若点P在关于x的二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a3e89560e2694f98dccd1a72e4ad2ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e0a621a4886d7682be536a9b3638728.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7eb449828552d859b80ceb6d3e0ada8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6310ab5dae1c53814dc65fc01b1211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7091d529281abff275ef19b9197445a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711bd7ed59701f6f8c54bbdb00364b2c.png)
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