1 . 圆
与圆
的公共弦长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d545fc27fb7a6c815b9558d09cd4b838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d740adc4df4799d70bfa3b9b68d184.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知球
的半径为3,相互垂直的两个平面分别截球面得两个圆
,其半径分别为
,若
,两圆的公共弦的中点为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3bb1740b0b07e5196662aee8110b21.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d096cd7bd8a5a2219fd7dd166bbb8460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff8543261a8e351eb95cdfebb001a3b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98d0e9e0dcd7c1cfe6ce951725d50e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3bb1740b0b07e5196662aee8110b21.png)
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3 . 已知直线
(
不同时为0),圆
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e95a4e689e4acf1cb2b9f863efa856e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab276155617fe201dcc71b5f1b54ab75.png)
A.当![]() ![]() ![]() |
B.当![]() ![]() ![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() ![]() ![]() |
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解题方法
4 . 由函数
图象上一点
向圆
引两条切线,切点分别为点
,连接
,当直线
的横截距最大时,直线
的方程为_________ ,此时![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77767fef71290daf6f6fe49b147db041.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6263576e5c3f2324a8dac311476bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec6d24be9315cc475c3fc388a6d0737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77767fef71290daf6f6fe49b147db041.png)
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5 . 已知
为椭圆
的左、右焦点,点
在
上且位于第一象限,圆
与线段
的延长线、线段
以及
轴均相切,
的内切圆的圆心为
.若圆
与圆
外切,且圆
与圆
的面积之比为9,则椭圆
的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7638c88f01d609d79947033ed4ff36a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.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/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da01a3abe1c9dc4e6283afa0dc1a0d39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4f6f74444b2b7947fc6e35c8d62322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 已知圆
和圆
,则两圆公切线的条数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70feca8eac775ebee7b6d9760e2be6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d260b618782c8dc983341317735a2737.png)
A.1 | B.2 | C.3 | D.4 |
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解题方法
7 . 设椭圆
的左、右焦点分别为
是
上的动点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbed61f2fa6116be9c19eaa2796663ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ed463bf16c78a4bbb9d3acff922afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() |
B.椭圆![]() ![]() |
C.![]() |
D.以线段![]() ![]() |
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解题方法
8 . 已知点P是椭圆
上除顶点外的任意一点,过点P向圆
引两条切线
,
,设切点分别是M,N,若直线
分别与x轴,y轴交于A,B两点,则
面积的最小值是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79f88c102345ea2d5d61771f42075453.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
您最近一年使用:0次
名校
解题方法
9 . 已知点
为
的中点,动点
分别满足
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c0b52bad5816ae1cb6c98a34d3037a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3b1d6fb4ca32b7f2a7a6e206b864e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d87446c9ef0230285d9b08127fce5c.png)
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10 . 若圆
与圆
恰有一条公切线,则下列直线一定不经过点
的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70feca8eac775ebee7b6d9760e2be6f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6285a0b323ce2e89786256b4674c504b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次