已知抛物线
的焦点F到其准线的距离为2,圆
,过F的直线l与抛物线C和圆M从上到下依次交于A,P,Q,B四点,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a21beb3c88e85fd5891d3a98fdd9ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07391e0d006375d82038ad813e2bfefc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a20bcc9ef96ecd9bce16db9cc27043f.png)
21-22高二下·河南郑州·阶段练习 查看更多[2]
河南省郑州市第四高级中学2021-2022学年高二下学期第一次调研考试文科数学试题(已下线)思想05 第三篇 思想方法(测试卷)--第三篇 思想方法-《2022年高考数学二轮复习讲练测(新高考·全国卷)》
更新时间:2022-02-28 09:35:21
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解题方法
【推荐1】设抛物线
的焦点为F,过焦点的弦为AB,若
均为整数,则弦AB的长度为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
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【推荐2】已知O为坐标原点,F为抛物线C:
的焦点,P为C上一点,若|PF|=
,则△POF的面积为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eddfd7d6c4b1ef685b2a5731c4d4ff0.png)
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【推荐1】已知直线
与抛物线
相交于
两点,
为
的焦点,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b26738c48adb1084268cc1f4e33db9fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1ba86ffc6e5542b62319848c14acaa.png)
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【推荐2】已知抛物线
的焦点为
,过点
的直线交
于
两个不同点,若
,则直线
的斜率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐1】抛物线
的焦点为
,直线
与抛物线
交于不同的
两点,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8902c263db5f913c55bc9a363fc3e4dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
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【推荐2】如图所示,在平面直角坐标系中,
,
,圆
过坐标原点
,圆
与圆
外切.则(1)圆
的半径等于__________ ;(2)已知过点
和抛物线
焦点的直线与抛物线交于
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,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54cd86870e3159d9731db3b821760244.png)
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