1 . 已知曲线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
,
是坐标原点, 过点
的直线
与曲线
交于
,
两点.
(1)当
与
轴垂直时,求
的面积;
(2)过圆
上任意一点
作直线
,
,分别与曲线
切于
,
两 点,求证:
;
的直线
与双曲线
交于
,
两点(
,
不与
轴重合).记直线
的斜率为
,直线
斜率为
, 当
时,求证:
与
都是定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d80b861ba40387cb2bcd04945f5a371a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5226a2e1ee83a869b1133a234e9f3108.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.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/acc290b44635265137fdf13146b6a6d9.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
(2)过圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be68dfb4d8b5f3adfc250b7d23e64165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/ada25f76504c3fd1226da43c94cb4277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/944e8452701ba3a0bf9d8561f7a4cad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1892b7c3cd7bea116f532f66fba44662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b647e083b52664749a2c07a13b6089c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284185654ca00ac9df0155d4c519a063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d303eb7923a91dcecc2d9bc1133d5c5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b38d23c520f89002afb0338bcb7b62c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22871505498b73670d0ee432ba402631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2297d08e5496a1af3f9ed1a1bbaea06.png)
您最近一年使用:0次
2 . 在平面直角坐标系
中,椭圆
,圆
为圆
上任意一点.
(1)过
作椭圆
的两条切线
,当
与坐标轴不垂直时,记两切线斜率分别为
,求
的值;
(2)动点
满足
,设点
的轨迹为曲线
.
(i)求曲线
的方程;
(ii)过点
作曲线
的两条切线分别交椭圆于
,判断直线
与曲线
的位置关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4402aeb853b22f20992156957ef0fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa0e17e5b3fe273afe0477f1c82270f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
(2)动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734959c9dad77e3463fac8a149f96996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(i)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(ii)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77024f98a315fe9604931f74967539b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d4315d7c1396985e292ba12e747524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb0cb4b2e0a7af501779001e4f6bb6c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
2024-03-08更新
|
801次组卷
|
3卷引用:专题2 解析几何中动点轨迹(方程)【讲】(压轴题大全)
名校
解题方法
3 . 已知椭圆
:
,
、
是
轴上不重合的两点,过点
作不与坐标轴垂直的直线
与椭圆
交于
、
两点,直线
、
分别与直线
交于
、
两点.
(1)若点
的坐标为
,点
的坐标为
,求点
的坐标;
(2)设
为线段
的中点,且
,求证:
;
(3)是否存在实数
,使得
为定值,若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bfec4efcc9f0e656d6864daaaef55d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451fc6e4248b63e70595f23842f06c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/28/b28305e6-3077-4f0b-a6b8-ba8b84c1c01f.png?resizew=150)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30de16d50098ed030a31a2f27faf7424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79491c84be5a178b5d7c0c090627da03.png)
(3)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02104738586aae1ca7975ec9967015a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解题方法
4 . 已知圆
,直线
过点
且与圆
交于点B,C,BC中点为D,过
中点E且平行于
的直线交
于点P,记P的轨迹为Γ
(1)求Γ的方程;
(2)坐标原点O关于
,
的对称点分别为
,
,点
,
关于直线
的对称点分别为
,
,过
的直线
与Γ交于点M,N,直线
,
相交于点Q.请从下列结论中,选择一个正确的结论并给予证明.
①
的面积是定值;②
的面积是定值:③
的面积是定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5f395de669fb40ce6a26d0c3158aa8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/879c9db500d9222b3e86779a4814a27d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbb85d28f8bdeedad66fd7ec2a561455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
(1)求Γ的方程;
(2)坐标原点O关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e884ca9429486026caa5e2310b0e4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/201d7685f19582f5d54f9205e8598d5a.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77fd540e5eea1a4e9d73b56acbf7340e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f30f6daddfc50a2bdd6ab80ef0969188.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78ae25bc675c4e1bc00fadbe25381c5.png)
您最近一年使用:0次
解题方法
5 . 已知曲线E:
的左右焦点为
,
,P是曲线E上一动点
(1)求
的周长;
(2)过
的直线与曲线E交于AB两点,且
,求直线AB的斜率;
(3)若存在过点
的两条直线
和
与曲线E都只有一个公共点,且
,求h的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4279b97cd056350b8edb171a1476f4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4f755709086891078194452d233ebb.png)
(3)若存在过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccb977f1e7d579c281d9541670882f78.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/1ce08b357f11ef44c3e8207ac574422a.png)
您最近一年使用:0次
6 . 已知点
分别为椭圆
的左、右焦点,直线
与椭圆
有且仅有一个公共点,直线
,垂足分别为点
.
![](https://img.xkw.com/dksih/QBM/2022/6/23/3007462180782080/3008755233570816/STEM/3f3781b1c1e648a78e380f6ee65b152c.png?resizew=412)
(1)求证:
;
(2)求证:
为定值,并求出该定值;
(3)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c8377df6ca3008270ea82927c3b5a34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c287201dc8f4b7e1a8dd41920654656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ae50196f4862bbfdfa8bbfd32ef02be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://img.xkw.com/dksih/QBM/2022/6/23/3007462180782080/3008755233570816/STEM/3f3781b1c1e648a78e380f6ee65b152c.png?resizew=412)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0354d888ad687a11009e40b654d1313f.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2f58272384b688bb53fe38abef3d93e.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a499dec7eebd81af41ea43cc6f2d6da.png)
您最近一年使用:0次
2022-06-25更新
|
2919次组卷
|
9卷引用:专题11 圆锥曲线综合
(已下线)专题11 圆锥曲线综合(已下线)专题22 圆锥曲线中的定点、定值、定直线问题 微点4 圆锥曲线中的定点、定值、定直线综合训练(已下线)考向37 圆锥曲线中的范围、最值问题(重点)(已下线)考向36 直线与圆锥曲线最全归纳(十六大经典题型)-2(已下线)专题12平面解析几何必考题型分类训练-4上海市闵行区2022届高考二模数学试题吉林省“BEST合作体”2022-2023学年高二上学期期末考试数学试题上海市闵行区七宝中学2024届高三上学期期末数学试题上海市黄浦区大同中学2024届高三下学期2月月考数学试题
名校
解题方法
7 . 在平面直角坐标系xOy中,已知点
,
,设
的内切圆与AC相切于点D,且
,记动点C的轨迹为曲线T.
(1)求T的方程;
(2)设过点
的直线l与T交于M,N两点,已知动点P满足
,且
,若
,且动点Q在T上,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a61b4d471f32a1dd5819e40874c8cd6.png)
(1)求T的方程;
(2)设过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294689a3fca9b1993954f898d0d09b0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49ceffbd72fec14f77c64f44d007289c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae34b0e6419f1ebbd0298ee814eacde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e1a418fe5bae31329e486ef3d1a26b2.png)
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2022-05-27更新
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3046次组卷
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5卷引用:专题6 圆锥曲线硬解定理 微点2 圆锥曲线硬解定理综合训练
(已下线)专题6 圆锥曲线硬解定理 微点2 圆锥曲线硬解定理综合训练(已下线)重难点15七种圆锥曲线的应用解题方法-3名校联盟山东省优质校2022届高三毕业班5月模拟考试数学试题贵州省贵阳市“三新”改革联盟校2022-2023学年高二上学期月考(六)数学试题湖北省武汉市新洲区第一中学2022-2023学年高二下学期开学收心考试数学试题
8 . 已知椭圆
,若下列四点_________中恰有三点在椭圆C上.
①
;②
.
(1)从①②中任选一个条件补充在上面的问题中,并求出椭圆C的标准方程;
(2)在(1)的条件下,设直线l不经过点
且与椭圆C相交于A,B两点,直线
与直线
的斜率之和为1,过坐标原点O作
,垂足为D(若直线l过原点O,则垂足D视作与原点O重合),证明:存在定点Q,使得
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10137ed8944f28b232b2eefb3310f606.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800405f52e3c99775128823093812cc9.png)
(1)从①②中任选一个条件补充在上面的问题中,并求出椭圆C的标准方程;
(2)在(1)的条件下,设直线l不经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3de68627f7f3d7f81b61bf743f311ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9019a986b3ba5fcefced99c566b5329c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cee097d4fe948c3d4f1b5c28b24adf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b5e0909915a39968fee2b2119c20b0c.png)
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2022-03-30更新
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1416次组卷
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3卷引用:高考新题型-圆锥曲线
解题方法
9 . 如图,已知椭圆
的左焦点为
,点
是椭圆
上位于第一象限的点,M,N是
轴上的两个动点(点
位于
轴上方),满足
且
,线段PN交
轴于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/783e5113-9c5d-4421-8ac8-e1e04ede1448.png?resizew=187)
(1)若
,求点
的坐标;
(2)若四边形
为矩形,求点
的坐标;
(3)求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3835e6398d18d162afebc92cd2ae9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce222d674159a5227460d34154d0c4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/24/783e5113-9c5d-4421-8ac8-e1e04ede1448.png?resizew=187)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d873050cd1473a6e8b92ff15da4dc031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51504dfdb80515cfaf47135c553f3ff6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99536bbe0ccc335b60ff89a0eeb7d5af.png)
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