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1 . 已知圆M:
(
为参数)的圆心F是抛物线E:
(
为参数)的焦点,过点F的直线交抛物线于A,B两点,,求
的取值范围__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b2af68df10a546d138c23737eba051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9d33ad04959ff0d34b542735b3a039c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b52610f3e635e37cecd9b2db5714c9b7.png)
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名校
2 . 内接于半径为R的半圆的周长最大的矩形的宽和长分别为_____________
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3 . 直线
(
为参数)被圆
截得的弦长为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0711c2bd410c7b87390e568b4ab8372e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08227ca941898eb34941f446ca8b1de8.png)
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4 . 直线l:x-y=0与椭圆
+y2=1相交A、B两点,点C是椭圆上的动点,则△ABC面积的最大值为________ .
![](https://img.xkw.com/dksih/QBM/2015/9/23/1572239484821504/1572239490809856/STEM/02a056cee18a45e99923ce3fd2fcbbcf.png?resizew=24)
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