20-21高一·浙江·期末
解题方法
1 . 如图,过抛物线
的焦点F的直线分别交抛物线于
两点交直线
于点P,若
,
,则
的值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb398137779190b35492d9f06d5fbc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd23837175365442869a4263776e4baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e684cdecf06e57614827b9b03e42fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
![](https://img.xkw.com/dksih/QBM/2021/1/15/2636498124529664/2636568211103744/STEM/70b60605-1a5d-4e74-8b51-f5ca0afdf6b3.png?resizew=287)
您最近一年使用:0次
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解题方法
2 . 若四棱锥
的侧面
内有一动点Q,已知Q到底面
的距离与Q到点P的距离之比为正常数k,且动点Q的轨迹是抛物线,则当二面角
平面角的大小为
时,k的值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9a369efbdd774d3dc4dd9489396023.png)
您最近一年使用:0次
2020-03-26更新
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404次组卷
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3卷引用:【新东方】双师119