1 . 若抛物线
上一点
到抛物线焦点的距离为1,则
点的横坐标是__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ccbf79da6ad7e3709d6fa72efb756.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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2 . 已知抛物线
的焦点为
,准线方程为
,点
是抛物线上的一点,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
___________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12dc1bdded62dae38ef3bd02e886757a.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9242eb0519dfc83e19d6a30df18120fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bde89931059759292206ad3e3af2c01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12dc1bdded62dae38ef3bd02e886757a.png)
您最近一年使用:0次
解题方法
3 . 抛物线
的焦点为F,点F关于原点的对称点为
,P为抛物线上一点,
,
,若
,则直线PF的斜率为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e55590555905eb4f57889bbd16e39a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28560d89f6edba2debfe53f202298e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af296c218d5cccd839b81c72e3af6005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/145f8cab0d3f8cbb80aaa6ee2628c080.png)
您最近一年使用:0次