名校
解题方法
1 . 在平面直角坐标系
中,已知以
为圆心的圆的方程为:
,以
为圆心的圆的方程为:
.
(1)若过点
的直线
沿
轴向左平移3个单位,沿
轴向下平移4个单位后,回到原来的位置,求直线
被圆
截得的弦长;
(2)圆
是以1为半径,圆心在圆
:
上移动的动圆 ,若圆
上任意一点
分别作圆
的两条切线
,切点为
,求
的取值范围
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d30337ed2f68b73a050688566eac4e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9429a41af4bde1708d92bb070604fed2.png)
(1)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1daf351485f3d6dee6bd4b16a65166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66e05c254ed4eef88ac40c7913dc656a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d79eb551b8051aea9beeed2ce16f18f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289bb17d1f49978abff09b8508dba782.png)
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2 . 已知圆
,直线
,圆
上任意一点
到直线
的距离小于
的概率为__________________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700984380878cddc75bbd18edcbda738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8422ca301505f4d809cff692750def26.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
您最近一年使用:0次
2017-07-24更新
|
1590次组卷
|
2卷引用:湖北省宜昌市部分示范高中教学协作体2016-2017学年高二下学期期中考试数学(理)试题
3 . 已知圆
的方程
.
(1)若点
在圆
的内部,求
的取值范围;
(2)若当
时,
①设
为圆
上的一个动点,求
的最值;
②问是否存在斜率是1的直线
,使
被圆
截得的弦
,以
为直径的圆经过原点,若存在,写出直线
的方程;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b6e91f5fe568f2df0a2b1255fb8b8fc.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dc6053a01d4152214bf165a237f57cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711b21672fd907c5c92fee1d649e7003.png)
①设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bcc89a085b0c46645858581cc48aa29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/449459ad9c5f3a2dce411b722dde995f.png)
②问是否存在斜率是1的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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