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1 .
经过伸缩变换
后所得图形的焦距
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d243009c6b609f2c6b7ddeb4dd540e9.png)
A.![]() | B.![]() | C.4 | D.6 |
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2019-07-15更新
|
914次组卷
|
6卷引用:安徽省亳州市第二中学2018-2019学年高二下学期期末数学(理)试题
安徽省亳州市第二中学2018-2019学年高二下学期期末数学(理)试题黑龙江省佳木斯市第一中学2017-2018学年高二上学期期中考试数学(文)试题(已下线)2019年5月27日 《每日一题》理数选修4-4-平面直角坐标系中的伸缩变换广西崇左高级中学2020-2021学年高二下学期期中考试数学(文)试题广西浦北中学2021-2022学年高二下学期期中考试数学(文)试题(已下线)第五篇 向量与几何 专题3 仿射变换与反演变换 微点5 仿射变换综合训练
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2 . 设
为坐标原点,椭圆
:
经过升缩变换
后变为曲线
,
是曲线
上的点.
(1)求曲线
的方程.
(2)设点
在直线
上,且
.证明:过点
且垂直于
的直线
过
的左焦点
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271e595c257e4c0ade90a9bbbf0e6b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dfa06467d100acf800b4d5fbe72d08c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba53065eb180a682305fddb95d14b62f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d7896d03df0abed59cc696526e1ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f0009063fe00277645aff1be6e32471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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3 . 在同一平面直角坐标系中,将直线
按
:
变换后得到的直线为l,则直线l的方程( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c294addf430488f632a664674043353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/048e102b0f23376d67ad8845583b32c6.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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4 . 已知圆A:x2+y2=1在伸缩变换
的作用下变成曲线C,则曲线C的方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1b9b1b7216ce04b7e81e1e449ebf68.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2018-08-15更新
|
780次组卷
|
4卷引用:安徽省蚌埠市第二中学2019-2020学年高二下学期期中文科数学试题
安徽省蚌埠市第二中学2019-2020学年高二下学期期中文科数学试题河北省巨鹿县二中2017-2018学年高二下学期期末考试数学(文)试题(已下线)2019年6月2日 《每日一题》理数选修4-5-每周一测内蒙古包头市第六中学2020-2021学年高二下学期期中考试数学(文)试题
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5 . 将曲线
按照
变换后的曲线的最小正周期与最大值分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b80457ae3049761d51f2a686f17dd33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eef3d366e0e336c5f3b43d2019cd24d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-04-20更新
|
584次组卷
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3卷引用:安徽省合肥一六八中学2019-2020学年高二下学期第四次线上测试数学(文)试题
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6 . 椭圆
经过伸缩变换
得到椭圆
的一个焦点是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8819ba9098daa6e24622fc975ab87d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a93972a70a40f8037a422a95b41c38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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7 . 在平面直角坐标系
中,以原点
为极点,
轴正半轴为极轴,取相同的单位长度建立极坐标系,已知曲线
,直线
.
(1)将曲线
上所有点的横坐标、纵坐标分别伸长为原来的2倍、
倍后得到曲线
,请写出直线
,和曲线
的直角坐标方程;
(2)若直线
经过点
且
,
与曲线
交于点
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70feca8eac775ebee7b6d9760e2be6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc3c0664eb11180c1ded169d007be76.png)
(1)将曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef812f839622326a7d7027cc806aaeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a52e26180930ad5b56a8a45f28a0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a52e26180930ad5b56a8a45f28a0f2.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce619c464f2aa04178ea0111ba60544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/530e5817131adf2c05b99ff18eb9060f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e88c9366bb209931c6b28353dbab9a52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39a52e26180930ad5b56a8a45f28a0f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b0834ee9e34bd0b3146bb59ea3c139.png)
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2018-01-18更新
|
801次组卷
|
3卷引用:【全国百强校】安徽省安庆市第一中学2018届高三热身考试数学(文)试题
8 . 在平面直角坐标系
中,曲线
的参数方程为
(
为参数),把曲线
上的点的横坐标缩短到原来的
倍,纵坐标伸长到原来的
倍后得到曲线
.
(1)求曲线
和
的普通方程;
(2)直线
的参数方程是
(
为参数),直线
过定点
且与曲线
交于
两点,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2beb91f10d2d8f2aa0dcc3f5cd1598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb6101e45f8d7013bc3dc4197188c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69b106731a4c1da0e2a229822cb033c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2df1bc516cf59796f7610454440afc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb6101e45f8d7013bc3dc4197188c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acfc9319b4dfcefd8f0bb0338f7cbf2.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb6101e45f8d7013bc3dc4197188c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acfc9319b4dfcefd8f0bb0338f7cbf2.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5725f27760ae810f92ffd901670a4a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c754bede58ec447f0b194b9f0a730fd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acfc9319b4dfcefd8f0bb0338f7cbf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae1567d8f98fabc1a3948f8602cc5e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71a813d0fbc97e5f93957f1cf4b9984e.png)
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