名校
1 . 如图,菱形
的边长为10,圆
分别与
相切于
两点,且与
相切于
点.若
,且圆
的半径为3,则
的长度为( )
![](https://img.xkw.com/dksih/QBM/2021/8/2/2777681467408384/2782948711071744/STEM/0d70a1a8fa5a404883552f71374a8efc.png?resizew=154)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55d8ad4817db3638a92dca881cd3a07f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a03a44398d3426a6fc161af8cbf98da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da009f0f3e676a61702a9e171eed0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://img.xkw.com/dksih/QBM/2021/8/2/2777681467408384/2782948711071744/STEM/0d70a1a8fa5a404883552f71374a8efc.png?resizew=154)
A.4 | B.5 | C.6 | D.7 |
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解题方法
2 . 关于直线
与函数
的图象的交点有如下四个结论,其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4d12362d4b8dd25813953e1c5a94b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b72e22d4175859634125f78a32a0fa3.png)
A.不论![]() | B.当![]() |
C.当![]() | D.当![]() |
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7卷引用:江苏省镇江市扬中市第二高级中学2021-2022学年高一上学期初检测数学试题
江苏省镇江市扬中市第二高级中学2021-2022学年高一上学期初检测数学试题(已下线)第2课时 课中 函数的表示方法(已下线)专题10 高考中的常青树分段函数-备战2022年高考数学一轮复习一网打尽之重点难点突破(已下线)课时3.1.2 (同步练习)函数的表示方法-2021-2022学年高一数学新课学习讲与练精品资源(人教版2019必修第一册)(已下线)专题06 函数的概念(已下线)专题06 函数的概念-43.1.2表示函数的方法
3 . 已知关于
的一元二次方程![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559299f59b89b7f033dc95f56c1a0b70.png)
(1)
时,求证:方程一定有两个实数根.
(2)有甲、乙两个不透明的布袋,甲袋中装有3个除数字外完全相同的小球,分别标有数字1,2,3,乙袋中装有4个除数字外完全相同的小球,分别标有数字
,从甲袋中随机抽取一个小球,记录标有的数字为
,从乙袋中随机抽取一个小球,记录标有的数字为
,利用列表法或者树状图,求
的值使方程
两个相等的实数根的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559299f59b89b7f033dc95f56c1a0b70.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc2371f9a64360a759b658db846aa166.png)
(2)有甲、乙两个不透明的布袋,甲袋中装有3个除数字外完全相同的小球,分别标有数字1,2,3,乙袋中装有4个除数字外完全相同的小球,分别标有数字
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f14db37344529d273e36d835241d0d39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c61bd0e9c2313936d4c4cdc1c8f1eb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/559299f59b89b7f033dc95f56c1a0b70.png)
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2卷引用:北京市中国人民大学附属中学2019-2020学年高一分班考试数学试题
名校
4 . 在等边
中,
分别是边
上的点
不与端点重合
,对于任意等边
,下面四个结论中:
①存在无数个
是等腰三角形;
②存在无数个
是等边三角形;
③存在无数个
是等腰直角三角形;
④存在一个
在所有
中面积最小.
所有正确结论的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ce06bb8a369ae82e8e174e8006b490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e362dd53fd164cbdde58636dd8131d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
①存在无数个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
②存在无数个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
③存在无数个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
④存在一个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d23b488f961d9fde37feb7f5c497c0d9.png)
所有正确结论的序号是
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5 . 如图的
中有一正方形
,其中
在
上,
在
上,直线
分别交
于
两点.若
,则
的长度为何
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/59fa689e-56c2-4ebc-8b4b-ba4ec1c4405e.png?resizew=181)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a03a44398d3426a6fc161af8cbf98da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a20145a7b2eff92c058170d97123a172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89dfcc5ea5ad1c0c8aba49ee618d72f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4460ce8e7e2a72761f6bcc04ad5561ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82bbee662e242611afdbdae4b8a36a7c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/59fa689e-56c2-4ebc-8b4b-ba4ec1c4405e.png?resizew=181)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 如图的七边形
中,
的延长线相交于
点.若图中
的外角的角度和为
,则
的度数为何?( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/966bb2f6-d399-4b46-b37d-e0a6784517ad.png?resizew=170)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20e38a1b5cfffd43a3405481a1d67cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb025beb66dc609261deac78327954c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2935c29f2abe3cad7b055b2818d591a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4997d209b675ba5f88df28b11890c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/966bb2f6-d399-4b46-b37d-e0a6784517ad.png?resizew=170)
A.![]() | B.![]() | C.![]() | D.![]() |
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7 . 如图,坐标平面上有一顶点为
的抛物线,此拋物线与方程式
的图形交于
两点,
为正三角形.若
点坐标为
,则此拋物线与
轴的交点坐标为何
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/86203242-a466-4683-b214-0778ed6b13db.png?resizew=209)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e84f0ba2f58312805017b0d93825f42f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcbcd0aebdd8bd688d108834747009f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82bbee662e242611afdbdae4b8a36a7c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/86203242-a466-4683-b214-0778ed6b13db.png?resizew=209)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 为打造精品赛事,某市举办“南粤古驿道定向大赛”,该赛事体现了“体育+文化+旅游”全方位融合发展.本次大赛分少年组、成年组、专业组三个小组,现由工作人员统计各个组别的参赛人数以及选手们比赛时的速度,得到如下统计表和频率分布直方图:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/905a8434-3950-47c9-ba5a-0376eb9bfb5b.png?resizew=238)
(1)求a,b的值;
(2)估计本次大赛所有选手的平均速度(同一组数据用该组数据的中间值作代表,最终计算结果精确到0.01);
(3)通过分层抽样从成年组和专业组中抽取6人,再从这6人中随机抽取2人接受采访,求接受采访的2人都来自“成年组”的概率.
组数 | 速度(千米/小时) | 参赛人数(单位:人) |
少年组 | ![]() | 300 |
成年组 | ![]() | 600 |
专业组 | ![]() | ![]() |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/905a8434-3950-47c9-ba5a-0376eb9bfb5b.png?resizew=238)
(1)求a,b的值;
(2)估计本次大赛所有选手的平均速度(同一组数据用该组数据的中间值作代表,最终计算结果精确到0.01);
(3)通过分层抽样从成年组和专业组中抽取6人,再从这6人中随机抽取2人接受采访,求接受采访的2人都来自“成年组”的概率.
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9卷引用:湖南省怀化市雅礼实验学校2023-2024学年高二上学期入学考试数学试题
湖南省怀化市雅礼实验学校2023-2024学年高二上学期入学考试数学试题四川省兴文第二中学校2023-2024学年高二上学期开学考试数学试题广东省汕尾市2020-2021学年高一下学期期末数学试题(已下线)第14讲 概率(核心考点讲与练)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)湖南省岳阳市临湘市2021-2022学年高一下学期期末数学试题湖南省岳阳市湘阴县2021-2022学年高一下学期期末数学试题湖北省部分重点中学2022-2023学年高二上学期9月联考数学试题甘肃省庆阳市第一中学2022-2023学年高一下学期期末数学试题广东省揭阳市揭东区2023-2024学年高二上学期期中数字试题
名校
解题方法
9 . 已知
中,边
的中线
长为3,若对
,
恒成立,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561acf30b972f1f0039b0c4a090913b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216667c17aa973a947df4b430abac93c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3卷引用:浙江省台州市书生中学2021-2022学年高二上学期起始考数学试题
名校
解题方法
10 . 甲、乙两人进行羽毛球比赛,采用三局两胜制(打满三局),已知甲每局比赛获胜的概率均为
.现用计算机随机产生的
之间的整数值来模拟甲和乙胜负的情况,用
,
,
,
,
,
,
表示甲胜,用
,
,
表示乙胜.由于是三局两胜制,所以以每
个随机数为一组,产生
组随机数:
,
,
,
,
,
,
,
,
,
,
,
,
,
,
,
,
,
,
,
.估计最终乙获胜的概率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebed85b827c546072839ace526275d35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b7571fd705b8e76afe3eb97a17f637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0116f7969f438b5cd1e53f82bed9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63bb8df879f87ebd57abd5fb0478c8a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a662ab955a36459df9a1742b460df973.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae80375a0181327dd8736e59165224bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f7be2cdb3a968dcbe8d8f65971fe38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a91fa0d183c31dbbdb459af6221d2f55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95755761f6f647ce38da9d65e4417c8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c817b794a1a5d523555fcc3397d25c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e708abb91d20725813358150b42093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e71cbabecccb74f2c51e171a9518d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/333e7f735642380eef1f863c2a65151a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b690aa1274dbc4a63a3016511a28447a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dda70559ed609f458d110bdfe3dbf36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a667302b9f5e096a0ab26dc1bbd3519b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7562eec570dda23e330402ff646dcc9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4411f473d46e2a8fdc74757089f8b3a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16bf8c7a532e5b2414fd693784c97e25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e805247e30db9a56510d7171bee1f3ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a92f0c97b830d72493757059d364909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5cecc7ac5871c5abad0ac695cf881f3.png)
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4卷引用:广东省茂名市信宜市第二中学2021-2022学年高二下学期开学热身考试数学试题(Ⅲ卷)
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