已知曲线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4da1dfa21052647b87087a6b66ae983.png)
(1)若
,过点
的直线
交曲线
于
两点,且
,求直线
的方程;
(2)若曲线
表示圆,且直线
与圆
交于
两点,是否存在实数
,使得以
为直径的圆过原点,若存在,求出实数
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4da1dfa21052647b87087a6b66ae983.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/148d97803c3b16893ced41ad5cd9aba4.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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a14a85d5d71e238da9f4e499faec0f30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baabfd32465e9e50409413d9c1358279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2017-08-18 14:08:50
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相似题推荐
解答题-问答题
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【推荐1】已知圆
的方程:![](https://img.xkw.com/dksih/QBM/2014/4/24/1571645356949504/1571645362610176/STEM/6c795f4e97e1457e8bf11d2b6c44374d.png)
(1)求m的取值范围;
(2)若圆C与直线
相交于
,
两点,且
,求
的值
(3)若(1)中的圆与直线x+2y-4=0相交于M、N两点,且OM⊥ON(O为坐标原点),求m的值;
![](https://img.xkw.com/dksih/QBM/2014/4/24/1571645356949504/1571645362610176/STEM/11bab54206444f8b9399cc0afda155e8.png)
![](https://img.xkw.com/dksih/QBM/2014/4/24/1571645356949504/1571645362610176/STEM/6c795f4e97e1457e8bf11d2b6c44374d.png)
(1)求m的取值范围;
(2)若圆C与直线
![](https://img.xkw.com/dksih/QBM/2014/4/24/1571645356949504/1571645362610176/STEM/bd97cd1882a54d13a40eb4843b03eb27.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/182bfe886400fd55c5f177a7aecb9b4c.png)
![](https://img.xkw.com/dksih/QBM/2014/4/24/1571645356949504/1571645362610176/STEM/f4499e3a02ba44d1ba4dbf2eff194cf4.png)
(3)若(1)中的圆与直线x+2y-4=0相交于M、N两点,且OM⊥ON(O为坐标原点),求m的值;
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【推荐2】如图,在平面直角坐标系
中,已知点
,圆
:
与
轴的正半轴的交点是
,过点
的直线
与圆
交于不同的两点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/ec101ce9-c40c-4f1a-8e03-2d2cc69aca41.png?resizew=179)
(1)若直线
与
轴交于
,且
,求直线
的方程;
(2)设直线
,
的斜率分别是
,
,求
的值;
(3)设
的中点为
,点
,若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7703165c3a15c78118f08e62ddca8ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/ec101ce9-c40c-4f1a-8e03-2d2cc69aca41.png?resizew=179)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d53da03483697543eeae841aebcd50d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf25e032b5599ac49383de06e776365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e3f7ddd51215d00661c09cd900d60.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c965b6673b5fe3164325ef11d4908e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905bff4015a5740df742efc7250f43d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc1ddff9c93c234562c44d1808831bc5.png)
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【推荐1】如图,在平面直角系
中,点A为曲线C:
在第一象限的图象上的动点,点E,G在曲线C的准线
上,且点G在x轴的下方,圆O与准线相切,直线
交曲线C于点B,交圆O于点D,H.
![](https://img.xkw.com/dksih/QBM/2020/7/3/2498193348247552/2498723000057856/STEM/44eb7e7276eb42b98e061a60cf8557de.png?resizew=227)
(1)当点H为曲线C的焦点,
时,求
;
(2)当点O为
的内心时,若
,求点A的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e96bf5d151b9d39b25c8ddc4d31ae029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://img.xkw.com/dksih/QBM/2020/7/3/2498193348247552/2498723000057856/STEM/44eb7e7276eb42b98e061a60cf8557de.png?resizew=227)
(1)当点H为曲线C的焦点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d6d8ea948f80350a06eb8b7a0bdb29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)当点O为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00870385ca7f3214e2971779eb4c7904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3601d0b4069c8893bfc820d07bc05b.png)
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【推荐2】已知直线l:x+y+3=0及圆C:
,令圆C在x轴同侧移动且与x轴相切,
(1)圆心在何处时,圆在直线l上截得的弦最长;
(2)C在何处时,l与y轴的交点把弦分成1:3;
(3)当圆C移动过程中与直线l交于A,B两点时,求
·
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a08bc125196ca72a9d355ea062c08035.png)
(1)圆心在何处时,圆在直线l上截得的弦最长;
(2)C在何处时,l与y轴的交点把弦分成1:3;
(3)当圆C移动过程中与直线l交于A,B两点时,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68628a408537b1cf3bf1ca2a69731b6.png)
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解答题-证明题
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【推荐1】在平面直角坐标系中,已知
,
,动点
满足
,设动点
的轨迹为曲线
.
(1)求动点
的轨迹方程,并说明曲线
是什么图形;
(2)过点
的直线
与曲线
交于
两点,若
,求直线
的方程;
(3)设
是直线
上的点,过
点作曲线
的切线
,切点为
,设
,求证:过
三点的圆必过定点,并求出所有定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311497849126f1aaf1da0ec75602eabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852b303689c31189cd47bb4a3220f9fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ff7e0ef1f622120cc1b18e9d3e80ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae0d9116a9c839264169b933aac70d6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.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/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c3461d9eab3be6d6a2d3c88435e0ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cb22624b0b2cb6fbf0c416d4e7f12ce.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/529e50733e7ad4f7b10127554fc65380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0f067a2a348ceb24a408f82992eab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93faeef4415eb7287ae1551aec97949e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73f63a96365f34139062648f3015fcf8.png)
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解题方法
【推荐2】已知圆
,直线
.
(1)求证:对
,直线
与圆
总有两个交点;
(2)设直线
与圆
交于点
,若
,直线
的倾斜角;
(3)设直线
与圆
交于点
,若定点
满足
,求此时直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c406915922045153a67d269f41ac4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3445947fa34dd409a1354786e6c4a579.png)
(1)求证:对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/313cfe91ae6e19135fa13ad96df2ef75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)设直线
![](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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c9708ef0dc6d6f5dcf6596d3e4f6e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839b9026408be532c90d251c008ed26a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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