1 . 直线
与抛物线
交于A,B两点,F为抛物线W的焦点.若
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953b0e963195605a67975c6f8f3caa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/482debf9e918c23fb2b192f93979daa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf10573c5ea2b397b8721d1db7f5cc2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
2 . (1)已知直线
经过抛物线
的焦点F,且与抛物线相交于A、B两点.若直线
的倾斜角为
,求
的值;
(2)抛物线
截直线
所得弦长等于?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0261104a7c308433a0c0508ff20ea29a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b40ecaf1c1ce4dc9e33c8dc8731f2123.png)
(2)抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3577bf250e9110428ff34f518fbd9f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd749e80e671faa681d3c40d032df26.png)
您最近一年使用:0次
2020-12-28更新
|
43次组卷
|
2卷引用:北京市昌平区新学道临川学校2020-2021学年高二年级12月月考数学(文)试题