名校
1 . 已知圆
,圆
,直线
上存在点
,过点
向圆
引两条切线
和
,切点是
和
,再过点
向圆
引两条切线
和
,切点是
和
,若
,则实数
的取值范围为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9d7e090b12ffb16e24babaaaa2a5770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42eea4c13fc3d9033a183c24a8385557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b47b462c24749cb5d9c540f1d9732153.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42751803931340f648d8edd2883cd15f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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解题方法
2 . 将字母a,a,b,b,c,c放入3×2的表格中,每个格子各放一个字母,则每一行的字母互不相同,且每一列的字母也互不相同的概率为______ ;若共有k行字母相同,则得k分,则所得分数
的均值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
您最近一年使用:0次
2021-12-10更新
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1018次组卷
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4卷引用:苏教版(2019) 选修第二册 名师精选 学业水平综合性测试卷
苏教版(2019) 选修第二册 名师精选 学业水平综合性测试卷人教A版(2019) 选修第三册 名师精选 学业水平综合性测试卷(已下线)第03讲 组合-【帮课堂】2021-2022学年高二数学同步精品讲义(苏教版2019选择性必修第二册)江苏省南京师范大学附属中学2021-2022学年高二下学期期中数学试题