1 . 已知点
在抛物线
上运动,过点
的两直线
与圆
相切,切点分别为
,当
取最小值时,直线
的方程为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/617d3975f2f3a55ebe30ec8001db6052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0873a0f3245544b4451ec5d2570dbe41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228bf1b66b2651cb40ec6912fc84b115.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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2024-02-29更新
|
584次组卷
|
3卷引用:辽宁省沈阳市第一二〇中学2023-2024学年高三第十次质量监测(最后一卷)数学试题
名校
2 . 已知圆
,过直线
上一动点P作圆C的两条切线,切点分别为A,B,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6bb6734e5f1d65e276e6007e3693c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d54768ddff965fb42fd598a145e5e0b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd79ea6078a73c1e7ec4769e5546abec.png)
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2024-01-22更新
|
760次组卷
|
2卷引用:重庆市沙坪坝区重庆一中2024届高三上学期12月月考数学试题
名校
3 . 已知圆
,直线
为
上的动点,过点
作圆
的切线,切点为
,则
的最小值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb95724e46951b22aefbbff99876109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b0f09210a526e4f2c7fc3d241c1dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d341082cc54b1cb7a790af9ec4a365d.png)
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2024-01-21更新
|
188次组卷
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2卷引用:重庆市好教育联盟2024届高三上学期12月联考数学试题
4 . 自圆
外一点
引该圆的一条切线,切点为
的长度等于点
到原点
的距离,则点
的轨迹方程为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8365d7c7c74eed93f5b9461ce31870f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aee82283f06cedef32eb15b87964f5d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b12eb4dc369e1e8565d2191d9ce193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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5 . 过点
作圆
(
为参数,且
)的两条切线分别切圆
于点
,
,则
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a4d8171374a7134e3d25b91fc4b198a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22dd8b3dc4c609bab82d356a5cc2208d.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/395ae88d64693e119da73abe23109bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3d08f0ab6e573253450e03427e13db1.png)
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6 . 已知圆E:
,点P是直线l:
上的一点,过点P作圆E的两条切线,切点分别为A,B,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e446428877558381252056e196467d04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ee71cd16525762ba7c697dcc0f32de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47a667c5817971aff6ae28a9156cf896.png)
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名校
7 . 已知圆
,圆
,过
轴上一点
分别作两圆的切线,切点分别是
,
,则
的最小值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d961491454fbfdb20038f4eb595e3f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e1a8c49b0ff6d6f33d37c326d5eec8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/ed1b3031d7393a63719166285314d73f.png)
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2023-12-16更新
|
360次组卷
|
2卷引用:安徽省六安市第一中学2024届高三上学期12月月考数学试题
2023·全国·模拟预测
8 . 设点P是圆
上的动点,过点P作圆
的两条切线,切点分别为A,B,则四边形PACB面积的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560adea7b0d4fbe4131fc41f3fcbd871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d3d5384c1516ec3940febd26ed6de6.png)
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名校
9 . 过直线
上一点
向圆
:
引切线,切点为
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d4cb0990b93c9900bab2784bef4b10f.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/a84206d21aa3ed77b34939ccc0252838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d341082cc54b1cb7a790af9ec4a365d.png)
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2023-11-18更新
|
389次组卷
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5卷引用:江苏省扬州市仪征中学、江都中学2024届高三12月联考数学试题
10 . 已知圆C:
及圆C外一点
,过点M作圆C的一条切线,切点为N,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3d627f5fbd04271389d503942d233.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331a133d2fff3d6e402f25143167fba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e991eefe80a67cd7092adbaf8c9c898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3d627f5fbd04271389d503942d233.png)
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