1 . 如图,
,点A,B为射线OP上两动点,且
,若射线OQ上恰有一个点C,使得
,则此时OA的长度为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98cdc1204d3b8b3f5bea86ee5dd41744.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/269c684310d0f7b5b9bf0a291e7ee748.png)
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解题方法
2 . 2024年4月30日17时46分,神舟十七号返回舱成功着陆,返回舱是宇航员返回地球的座舱.返回舱的轴截面可近似看作是由半个椭圆 和一段圆弧 组成的“果圆”.如图,在平面直角坐标系中,某“果圆”中圆弧经过椭圆的一个焦点
和短轴的两个顶点
与
.
(2)直线
交该“果圆”于A、B两点,求弦AB的长度(精确到0.01).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7345600383230ab4325bd6310813f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c0573e2af8a0dc8c6a1c0af067a324f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee8c50793afd59e6ab4a2be5a877759.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
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解题方法
3 . 圆
在点
处的切线方程为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a143573e9fe53e6a861154bf5b4c27c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ecd1eb0eafdc172501d3731c9bbd2a.png)
您最近一年使用:0次
4 . 过点
向圆
作两条切线,切点分别为
,若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fffd1af70bfee78356fc7c515c283730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675fc8ea457e0ceb6c0adf455d8a9c3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4215ae359227ff75071903accff4feba.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
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5 . 直线l:
被圆C:
截得的弦长为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b05063aa8290b34b56ac3b6193cba95f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceefb41e62dc253988b7241c9522fbf1.png)
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解题方法
6 . 圆
被直线
所截线段的长度为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc12c55f2676aeb4f696f4a84e4d65b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beff5e5c9df612aa7890170d9b836f39.png)
A.2 | B.4 | C.![]() | D.![]() |
您最近一年使用:0次
名校
7 . 在平面直角坐标系
中,已知圆
,若直线
上有且只有一个点
满足:过点
作圆
的两条切线
,切点分别为
,且使得四边形
为正方形,则正实数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8785046420bdd426bbd7a26041ff214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e788a289771f6005b8cde7f30a1596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec8858389f4c3156a946ba8bf0d8a7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3029ea5516e56e8d20594c71929624f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.-5 | B.3 | C.![]() | D.7 |
您最近一年使用:0次
23-24高二下·上海·期末
解题方法
8 . 已知圆
的方程为
,点
,
是圆
内一点,设以
为中点的弦所在的直线为
,方程为
的直线为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3503d330608e7138d1b529aba4512fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bec550c01b4f075f22ab67f5e55ed5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a98de9c1dc89032bf179b4969a33bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8915a09a3370c14323e9a0164a5ee9cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.![]() ![]() ![]() | B.![]() ![]() ![]() |
C.![]() ![]() ![]() | D.![]() ![]() ![]() |
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9 . 已知点
,动点
满足
,则
取得最小值时,点
的坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1971d16eaaec0a80ff99f3054820de2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df5d30e4268a4b86a4e098e8cb57da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da95fbf462f15884c1194057edd2f5f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
10 . 已知圆
与圆
交于A,B两点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c783a9a64c4a4b39cb489cca1391d36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/449494fe8f86b483c87997cbfa62fec9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d103d683d2fd06b6fa9ec5523c2ea0c9.png)
A.![]() | B.5 | C.![]() | D.![]() |
您最近一年使用:0次