直线
与圆
相交于两点A,B,点
为圆心,且
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6081c3b84015ecdedc34046ebadecc40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c0707232dffa97ef15df4cbd74e1517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5558ffa6dc28d437c0467c7f361d444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953ce2cc3dd6d0b091793418bd4ae500.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
更新时间:2021-12-02 21:28:41
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【推荐1】在
中,点
是边
的中点,已知
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1286aa539547b210fbe2f6537a819f77.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】若平面内不共线的三个向量
两两的夹角相等,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/463178ef6d30cfc6fa03ada498868fcb.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e12e95f703ad30ab9a3d38376830989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4edbe9ad7f7afe8a2cded47e78ed6270.png)
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填空题-双空题
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【推荐1】我们通常称离心率为
的椭圆为“黄金椭圆”.如图,已知椭圆
,A1,A2分别为左、右顶点,B1,B2分别为上、下顶点,F1,F2分别为左、右焦点,P为椭圆上一点,现给出以下四个条件:①
;②
;③
轴,且
;④四边形的
的内切圆过焦点
,
.其中能使椭圆C为“黄金椭圆”的条件是______ 和______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/029d393bb07b7140905b85f550519de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f9e2804e185c76610e76f5fca07d5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a2d6cac4d3fb5ca9072d1431c28e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385b624c6c46509e20aae15577d91997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa9a6be97b5f275d55697fd3cd0a442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a87155e4c733962a4f25f639e8e9c51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c80eaed4257dc101cc12a838803cfa7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/a83b8e4f-cc72-4ff4-b9ab-aab277e035c4.png?resizew=245)
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【推荐2】如图,正方形
的边长为4,E是边AB上的一动点,
交EC于点P,且直线FG平分正方形
的周长,则当线段BP的长度最小时,点A到直线BP的距离为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab5814811059e40b53e9e5ba32b7c29d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐1】已知圆
:
和圆
:
的公共弦所在直线横过定点P,若过点P的直线l被圆
上截得的弦长为
,则直线l的方程为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06c8ffa49a58ce4dd9af18a5fc964903.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f70ac2df50bc21d6eeeed2161a7a7ec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd6d5018b988d9843479cfdcfd3a522d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
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【推荐2】在平面直角坐标系xOy中,已知点A,B在圆心为C的圆
上运动,且
.若直线l:
上至少存在两个点
,使得
成立,则实数m的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78045466bc46bba9015fa171b95cd654.png)
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