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1 . 加斯帕尔·蒙日(图1)是18~19世纪法国著名的几何学家,他在研究圆锥曲线时发现:椭圆的任意两条互相垂直的切线的交点都在同一个圆上,其圆心是椭圆的中心,这个圆被称为“蒙日圆”(图2).则椭圆
的蒙日圆的半径为___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e22423d3a2efbc63652fa6f113c9a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/b9e95639-e9d4-45b6-b7c2-5cbdd54a3467.png?resizew=226)
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2 . 与圆
有相同圆心,且过点
的圆的标准方程是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c517bf85b54edb2ec28375c8f40fc392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20660e49954f09601cbf528a7f436fca.png)
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3 . 已知点
,
,以线段AB为直径的圆的标准方程为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a16a46f03535c5af872fa8fa9f21a431.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f68f688a0af020ed2aa105a1bcdb52.png)
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4 . 以两条直线
的交点为圆心,并且与直线
相切的圆的方程是_____________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced2fbf08310eee95c31a0891b23b8ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274641ca2216d05465dada099ef933e0.png)
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5 . 已知圆
的圆心与抛物线
的焦点关于直线
对称,直线
与圆
相交于
两点,且
,则圆
的方程为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2297db3c14c256b9691fbb8e5bba978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84cef568cfe2fc12a4dec11533ada274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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6 . 已知直线
与直线
相交于点
,其轨迹记为曲线
,曲线
的方程为
,点
,
分别在曲线
,
上运动,点
在直线
上,若直线
经过点
,且与两曲线
,
的公共弦所在的直线垂直,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d19b5f51544de84ec35a34a992ce114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd7a3c761ade49cc51ea60214af887e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b16225c4923f43fb57ab484753c4f01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74b72de4221a7de45fad497d0bb7ac1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1b3031d7393a63719166285314d73f.png)
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7 . 直线
被圆
截得的弦长为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1cb41222d27da278a922db1cd5cb34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed83c1c5fe09e778f9514afb5c5471e.png)
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8 . 如图,已知
是圆
的弦,
为
的中点,且
在弦
上的射影为
,则
,该定理称为阿基米德折弦定理.在上述定理中,若已知
,
,点
在直线
下方,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
,则过点
的圆的方程为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e91ab9a7ef3ecc7ca88a7f2fe4abb688.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0ff808cf596294204a404d0a34f3e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db5080bbcf65607bfba31b7f560b323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d14cd46db17d64f86660b987402503a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ba793283da4a8942777027c49ac757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a83dead62a34a5393d67ed69c23dd036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28e111bfa9ab7295f9689451da535ba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/33090614-0603-4f70-8713-dd47b8686c33.png?resizew=163)
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2卷引用:湖南省衡阳市衡阳县2023-2024学年高二上学期1月期末考试数学试题
9 . 已知抛物线
的焦点为
,点
为
上一点且在第一象限,以
为圆心,
为半径的圆交
的准线于
两点.若
,则圆
的方程为__________ ;若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.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/82aaa597a5aa6176863eda3fdf83e181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac3649308b528fd56545ba102dc42d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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10 . 若圆被直线
平分,则圆C的半径为
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