1 . 已知四边形
的顶点分别为
,
,
,
,四边形
在伸缩变换
的作用下变成正方形,则
的值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b47e7bf02b3ca16f7d96b9369e51a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3752eaf8b6f65d3faf930dc54bf2ef1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266a1fd9667006e83c4ad72a177d248e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc3de0113e940bea53e93e5b24750f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2 . 在同一坐标系中,方程
经过伸缩变换
后表示的图形是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69afa13d47a3b2537296de22bcc48d03.png)
A.焦点在![]() |
B.焦点在![]() |
C.焦点在![]() |
D.焦点在![]() |
您最近一年使用:0次
3 . 点
经过伸缩变换
后的点的坐标是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f114df5ceabdb7e5fd3fdad4eaf056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1a5bfd4582b7fe96534c6b1704bc319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
4 . 在同一坐标系中,将曲线
变为曲线
伸缩变换是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c191fdfd08fb94ba6ed45c71f0fbeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23c55534617826757b4cf51b89034cd2.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2018-07-08更新
|
493次组卷
|
2卷引用:人教A版 全能练习 选修4-4 第一讲 第一单元 2.平面直角坐标系中的伸缩变换