已知抛物线
的焦点为F.
(1)求F的坐标和抛物线C的准线方程;
(2)过点F的直线l与抛物线C交于两个不同点A,B,再从条件①、条件②这两个条件中选择一个作为已知,求
的长.
条件①:直线l的斜率为1;
条件②:线段
的中点为
.
注:如果选择条件①和条件②分别作答,按第一个解答计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
(1)求F的坐标和抛物线C的准线方程;
(2)过点F的直线l与抛物线C交于两个不同点A,B,再从条件①、条件②这两个条件中选择一个作为已知,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaff41080fdea43eea7efedf9ebc1498.png)
条件①:直线l的斜率为1;
条件②:线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/407417c2fd059a0cbb54f27edb8876bd.png)
注:如果选择条件①和条件②分别作答,按第一个解答计分.
更新时间:2023-01-02 23:42:37
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