已知在平面直角坐标系:
中,动圆P与圆
内切,与圆
外切,记动圆圆心P的轨迹为曲线E.
(1)求E的标准方程.
(2)若直线
与E交于A,B两点,直线
与E交于另一个点M,连接AM交x轴于点N,试问是否存在t,使得
的面积等于
?若存在,求出t的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efebf14524c191161c0bc68b5f2bfcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b224ecdd250802ef0753e9f1fbb7c426.png)
(1)求E的标准方程.
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c54b7a45b14a9a904dec97e5316c7b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7023b649fd84f998d741edfb6c209ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e125016253ec8a4bb0cdf2a7046f3f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31da7291140e430a11e2a10cc6cdefbb.png)
21-22高三上·江西景德镇·阶段练习 查看更多[3]
更新时间:2022-03-04 21:40:09
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【推荐1】已知圆A:(x+3)2+y2=100,圆A内一定点B(3,0),圆P过点B且与圆A内切,如图,求圆心P的轨迹方程.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/4/679f88a4-1072-4ad0-b247-9349506869c0.png?resizew=158)
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【推荐2】一动圆与圆
外切,同时与圆
内切,动圆圆心的轨迹为曲线
.
(1)求曲线
的方程;
(2)点
为
上一动点,点
为坐标原点,曲线
的右焦点为
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d008f0825083c74d3da4d87db1eab440.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/869b84b96637d80f7dbb2bde218a4e72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/121fdb78e9812aa208a5efb708521011.png)
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【推荐1】已知
,
是椭圆
:
的左、右焦点,曲线
:
的焦点恰好也是
,
为坐标原点,过椭圆
的左焦点
作与
轴垂直的直线交椭圆于
,
,且
的面积为3.
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712416127852544/2715102892621824/STEM/12133aa17bff49bd9c57cc0298b6115d.png?resizew=227)
(1)求椭圆
的方程;
(2)过
作直线
交
于
,
,交
于
,
,且
与
的面积相等,求直线
的斜率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4f150ab98bde511e0f65d9bafab031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5585a42c8f07ad90b94ace9db3d78994.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712416127852544/2715102892621824/STEM/12133aa17bff49bd9c57cc0298b6115d.png?resizew=227)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4f150ab98bde511e0f65d9bafab031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c07ebcbfacda073208d483c58e8a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐2】已知椭圆C:
的左右焦点分别为
,
,左顶点为A,上顶点为B,离心率为
,
的面积为
.
求椭圆C的标准方程;
过
的直线l与椭圆C相交于不同的两点M,N,求
内切圆半径的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df4f17848c072b51e80d427d486e31.png)
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