已知A(8,0),B(4,0),动点M(x,y)满足:|MA|=
|MB|.
(1)求点M的轨迹方程;
(2)过点E(1,0)的直线交(1)中轨迹于PQ两点,交y轴于F点,若
,
,求证:λ1+λ2为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(1)求点M的轨迹方程;
(2)过点E(1,0)的直线交(1)中轨迹于PQ两点,交y轴于F点,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18321f82518371658d002fa20e499266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efe729487cdaeba9fc73fd97b3db9c9f.png)
更新时间:2020-12-11 09:31:22
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解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐1】已知点
和点
,动点
满足
.
(1)求动点P的轨迹方程;
(2)过点
作x轴的垂线,垂足为
,求
的中点
的轨迹方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c850811ba59a05e945a665196539a048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f8b0e451360ea32c68145443872f42.png)
(1)求动点P的轨迹方程;
(2)过点
![](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/ac047e91852b91af639feec23a9598b2.png)
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解答题-证明题
|
较易
(0.85)
【推荐1】如图,在平面直角坐标系xOy中,已知圆
,圆
设动圆C同时平分圆
、圆
的周长.
![](https://img.xkw.com/dksih/QBM/2022/1/2/2885855385952256/2886684659810304/STEM/8da4d592eded4551820e7e8ca9a881aa.png?resizew=168)
(1)求证:动圆圆心C在一条定直线上运动.
(2)动圆C是否经过定点
若经过,求出定点的坐标
若不经过,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8284506de3f837db03d167c73c4af43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7667ce3af9979e585cb8fb750b30454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://img.xkw.com/dksih/QBM/2022/1/2/2885855385952256/2886684659810304/STEM/8da4d592eded4551820e7e8ca9a881aa.png?resizew=168)
(1)求证:动圆圆心C在一条定直线上运动.
(2)动圆C是否经过定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97ec04a1aa7ac6fce72d589864940a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ca6fa9955690cec01db601e3abce0c.png)
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【推荐2】已知圆
,设
,过点
作斜率非0的直线
,交圆
于
两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/1231787e-ca92-4a55-acbc-f6c44ea07bf0.png?resizew=174)
(1)过点
作与直线
垂直的直线
,交圆
于
两点,记四边形
的面积为
,求
的最大值;
(2)设
,过原点
的直线
与
相交于点
.
证明:点
在定直线
上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd8471058541d558ccdc7331818c069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/269a51e0f77f63bae2df3dc8b1d4f455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/1231787e-ca92-4a55-acbc-f6c44ea07bf0.png?resizew=174)
(1)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebcad0585886e2d7bac28a0e292a1d37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fbdef5d0c05acbf63fa72fa85c5bb45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
证明:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb489e91a4b601413959b0954531df8.png)
您最近一年使用:0次