(1)一动圆过定点
,且与定圆
相切,求动圆圆心的轨迹E的方程.
(2)直线l经过点A且不与x轴重合,l与轨迹E相交于P、Q两点,求
的面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6ff81aedbefa935da289dc632e78eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a217d78ad51a0e59b19d6067f3ea991c.png)
(2)直线l经过点A且不与x轴重合,l与轨迹E相交于P、Q两点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e87b2f781cafa7989d81f9bf8c42b150.png)
20-21高三·西藏拉萨·阶段练习 查看更多[4]
西藏自治区拉萨中学2021届高三第七次月考数学(文)试题西藏自治区拉萨中学2021届高三第七次月考数学(理)试题(已下线)专题03 圆锥曲线面积问题-【解题思路培养】2022年高考数学一轮复习解答题拿分秘籍(全国通用版)(已下线)第11讲 椭圆(6大考点)-2022-2023学年高二数学考试满分全攻略(人教A版2019选修第一册)
更新时间:2021-09-12 11:47:55
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】在平面直角坐标系
中,点
,
,
,点M的轨迹为C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/5c80115f-841a-4ab8-a797-582ea34975f2.png?resizew=236)
(1)求C的方程:
(2)设点P在直线
上,过点P的两条直线分别交C于A,B两点和G,H两点,若直线AB与直线GH的斜率之和为0,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9d55173f26afdf0e37462b556a605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d6f746c2355072d914591bf60c3801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eed5b1b5a80e66f5a6cd08be019376c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/5c80115f-841a-4ab8-a797-582ea34975f2.png?resizew=236)
(1)求C的方程:
(2)设点P在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64fe16bce3d0c69901b8fa6c9d33a7f4.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】已知圆
与x轴的正半轴交于点A,过圆O上任意一点P作x轴的垂线,垂足为Q,线段PQ的中点的轨迹记为曲线
,设过原点O且异于两坐标轴的直线与曲线
交于B,C两点,直线AB与圆O的另一个交点为M,直线AC与圆O的另一个交点为N,设直线AB,AC的斜率分别为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44f67daeddff2e805bf34d43e629d959.png)
.
(1)求
的值;
(2)判断
是否为定值?若是,求出此定值;否则,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44f67daeddff2e805bf34d43e629d959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509bb54bce15c0d97ca43f2abd2c6852.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】已知椭圆
中心在原点,左焦点为
,其四个顶点的连线围成的四边形面积为
.
(1)求椭圆
的标准方程;
(2)过椭圆
的左焦点
作斜率存在的两直线
、
分别交椭圆于
、
、
、
,且
,线段
、
的中点分别为
、
.求四边形
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e1a85a657231ef717809d5a839ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)过椭圆
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/dae7f709cd4bf123f329605b2f9ea679.png)
您最近一年使用:0次
【推荐2】设椭圆
(
)上的任意一点动点
,上顶点为A.
(1)当上顶点A坐标为
,离心率
时,求
的最大值;
(2)过点
作圆
的两条切线,切点分别为
和
,直线
与
轴和
轴的交点分别为
和
,求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)当上顶点A坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a203d0478f8390fa2b346500ccb2b63.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8593c731d1b9ba823b4d1570a7e974b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/b14aeac55d519010de23642ac22cfb0b.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知椭圆
的焦距为
,
分别为左、右焦点,过
的直线
与椭圆C交于M,N两点,
的周长为8.
(1)求椭圆C的标准方程;
(2)求三角形
内切圆半径的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b5c81ee16e93e9822c4dc54c362cb3.png)
(1)求椭圆C的标准方程;
(2)求三角形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4b5c81ee16e93e9822c4dc54c362cb3.png)
您最近一年使用:0次
【推荐2】在平面直角坐标系xOy中,已知点
,
,点P满足
.记P的轨迹为M.
(1)求M的方程;
(2)直线
交M于A,B两点,C,D为M上的两点,若四边形ACBD的对角线
,求四边形ACBD面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17618d8d22ebb3fd6835a7eb139b4f95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13683e2ecf2164a0adbfdb9923d210a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b64c866c59cf032369c3ac3b48b9f7b.png)
(1)求M的方程;
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb2e58d7f7f5736a2ca43175ac584dae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
您最近一年使用:0次