若直线
与圆
相交于A,B两点,当
取得最小值时,直线l的斜率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00f86b1a1443f82bf9370c247718fb23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/172a06a79a2c15b387b924a1b0eb4582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaff41080fdea43eea7efedf9ebc1498.png)
22-23高三下·河北邯郸·开学考试 查看更多[2]
更新时间:2023-02-04 10:11:13
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【推荐1】知实数x,y满足
,则
的取值范围为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/023936b624fc7a055e423c6fef9b2aed.png)
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【推荐2】已知直线
,
与圆
分别交于点A,B和C,D,则四边形
的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1d8d5cea065075fe50706abe3ae802.png)
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【推荐1】以直角坐标系的原点为极点,
轴的正半轴为极轴,并在两种坐标系中取相同的长度单位,已知直线的极坐标方程为
,它与曲线
(
为参数),相交于两点
和
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334781c7fe448516f45ee4da928b9dea.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2aeafbb2f3f83949ccc9b3d25b7e6c4.png)
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【推荐2】已知
为椭圆
上一动点,
为坐标原点,
,
两点在圆
上,且满足
.
(1)记
中点为
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的轨迹方程为____________ ;
(2)弦长
的取值范围为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/914075a4574c09bdb860d8f8f09a4e7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bf6b1c26e6ae9666e8c4683bab97cd4.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(2)弦长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
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