将圆
上每一点的横坐标变为原来的
倍,纵坐标不变,得到曲线
.
(1)求曲线
的参数方程;
(2)求曲线
上的点
,使得
取得最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a7d5641ca0bf724654e199df717d2f.png)
更新时间:2016-12-04 21:33:41
|
相似题推荐
解答题-问答题
|
较易
(0.85)
名校
【推荐1】同一平面直角坐标系中,经过伸缩变换
后,曲线
变为何种曲线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ccce02fccf9fbbe70204dea9e92eac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90af67e4c90e378ade7773722e805b59.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】在同一平面直角坐标系中,经过伸缩变换
后,曲线
变为何种曲线,并求曲线的焦点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c15a1582bf5881a498ce91eb27ab08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90af67e4c90e378ade7773722e805b59.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】在平面直角坐标系
中,以坐标原点为极点,
轴的正半轴为极轴建立极坐标系,曲线
的极坐标方程为
.
(1)将
的极坐标方程化为直角坐标方程;
(2)设点
的直角坐标为
,
为
上的动点,点
满足
,写出
的轨迹
的参数方程,并判断
与
的公共点个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.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/9e0cb878349009a779d94b1bc40319bb.png)
(1)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f2ae8b3a8e62dd5e87d63f0ed32561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐2】已知曲线
,直线
为参数).
(Ⅰ)写出曲线
的参数方程,直线
的普通方程;
(Ⅱ)过曲线
上任意一点
作与直线
夹角为
的直线,交
于点
,求
的最大值与最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb7101fa9146fdec51d44b8bf481dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebdb7a594f0a16903dd0188454bc08f.png)
(Ⅰ)写出曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(Ⅱ)过曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce5dcaffd91bc44cda4a2e44000ae73.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】已知曲线
的极坐标方程是
,以极点为原点,以极轴为
轴的正半轴,取相同的单位长度,建立平面直角坐标系,直线
的参数方程为
(
为参数)
(1)写出直线
的极坐标方程与曲线
的直角坐标方程;
(2)设曲线
上任一点为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f917a2022014d9c19c29eeac84c74e2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0dc92ad29632d82296f8e2216c48039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(1)写出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22962a2ad892cb6b14ab039a06e8cdc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b9da58357174383cb393e03fb3f946.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐2】在以原点O为极点,x轴正半轴为极轴建立极坐标系,直线l的极坐标方程为
,平面直角坐标系xOy中,曲线C的参数方程为
(
为参数).
(1)设直线l与曲线C交于M,N两点,求|MN|;
(2)若点P(x,y)为曲线C上任意一点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d57678b93f1dcb18d4cbb33ff70bce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37924f171466127448ff27b8fe178621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(1)设直线l与曲线C交于M,N两点,求|MN|;
(2)若点P(x,y)为曲线C上任意一点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3c5cff31ff2fcdcf734ed63f69da90.png)
您最近一年使用:0次