动点
分别到两定点
连线的斜率之乘积为
,设
的轨迹为曲线C,F1、F2分别为曲线C的左、右焦点,则下列命题中:
(1)曲线C的焦点坐标为F1(﹣5,0)、F2(5,0);
(2)若
,则
;
(3)当
时,
的内切圆圆心在直线
上;
(4)设
,则
的最小值为
;
其中正确命题的序号是:___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ff7e0ef1f622120cc1b18e9d3e80ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8946ae18d5ca79c14ba10183e83b0bc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b282c337227aa697d420b8c3c8d4309.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ff7e0ef1f622120cc1b18e9d3e80ec.png)
(1)曲线C的焦点坐标为F1(﹣5,0)、F2(5,0);
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be26d0e6ebd45c93dec950b75444b673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4b4dd5657764ca858e8afac31f7be4c.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f9a699aededce0ad803bf8257fbbcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba53065eb180a682305fddb95d14b62f.png)
(4)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed0acdfb65ea3e9a37f01368eb8bd3bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da08cf1ebf1375c55a87433526b5db84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bfc6de3e646e636050b22d34eb2dc78.png)
其中正确命题的序号是:
更新时间:2021-12-03 07:10:28
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