已知圆心在
轴上的圆
与直线
切于点
.
(1)求圆
的标准方程;
(2)已知点
,直线
与圆
交于
两点.
(ⅰ)求证:
为定值;
(ⅱ)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bba5922f974abd7883d7a5dcddb8e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbe3d07387b81817ca97b865e40f68d8.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e258dc5c8b4ea30bca80a56098065402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1325c6fe42a9e5c04520d8a9bb6821b8.png)
(ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20fef976a0230bdfe3bc758e93987ba8.png)
(ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/576e041b609a0796e51b12e33593ed8e.png)
17-18高三上·黑龙江牡丹江·期中 查看更多[4]
黑龙江省牡丹江市第一高级中学2018届高三上学期期中考试数学(文)试题四川省遂宁市2017-2018学年高二上学期期末考试数学文试题(已下线)2018年高考二轮复习测试专项【新课标文科】热点九 与圆有关的最值问题四川省遂宁市2017-2018学年高二上学期教学水平监测数学(文)试题
更新时间:2017-12-05 19:36:58
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【推荐1】已知抛物线
,焦点为F,点P是C上任一点(除去原点O),过点P作C的切线
交准线于点Q.
(1)当点P为
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(2)若点P在第一象限,点R在准线上且位于点Q右侧,证明:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(1)当点P为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80991c1f0c963104740e50cfff6f29a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adccd1dd14171c8c29d4a3836728c0f.png)
(2)若点P在第一象限,点R在准线上且位于点Q右侧,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0c89667076d0ffba1684a7589e9867c.png)
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【推荐2】如图;.已知椭圆C:
的离心率为
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设圆T与椭圆C交于点M、N.
![](https://img.xkw.com/dksih/QBM/2018/3/23/1908375123673088/1909880930058240/STEM/c14030aafbd44b6f99009d5dbdf3e943.png?resizew=256)
(1)求椭圆C的方程;
(2)求
的最小值,并求此时圆T的方程;
(3)设点P是椭圆C 上异于M,N的任意一点,且直线MP,NP分别与
轴交于点R,S,O为坐标原点. 试问;是否存在使
最大的点P,若存在求出P点的坐标,若不存在说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0dce10bf671cc2ebc67aa7fd568a9a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
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(1)求椭圆C的方程;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38677fc803336b415d90ce1a015b2ab7.png)
(3)设点P是椭圆C 上异于M,N的任意一点,且直线MP,NP分别与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐1】已知动点
是曲线
上任一点,动点
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的距离和到直线
的距离相等,圆
的方程为
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(2)设
、
、
是
上的三个点,直线
、
均与圆
相切,判断直线
与圆
的位置关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41dc790529ff052b5669c5c408d9e546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc5c19ac440746be97d8b46af5d288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df2242628b34ab212c427af380952db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ee88c4f5f615a00266133d8957727c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a28be4d5a16cf245f6fa7c4088fee4.png)
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9721059d158853671eaf19e39769b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8db4b168ddbcba90ac9b31d36a0432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0709502551b86b7ae008cb6d7c2ec8c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8827bb81ddef56b9847bc481c840094.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b3e66f9a9eefdda05ebe3b028f4c6bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a28be4d5a16cf245f6fa7c4088fee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8eb86d2acdfb3756100707eb378764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a28be4d5a16cf245f6fa7c4088fee4.png)
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【推荐2】已知圆C经过
两点,圆心在直线
上.
(1)求圆C的标准方程;
(2)若圆C与y轴相交于A,B两点(A在B上方).直线
与圆C交于M,N两点,直线
,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39c6e26f00e8355a504646be0720e19b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42498f6e0fc9a61c9857b70a87f02c5e.png)
(1)求圆C的标准方程;
(2)若圆C与y轴相交于A,B两点(A在B上方).直线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
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