1 . 李明和张健站在罚球处进行定点投篮比赛其结果如下表所示:
上表数据显示,李明投中的频数是 ____________ ;投中的频率是 ____________ ;张健投中的频数是 ____________ ,投中的频率是 ____________ ,两人中投中率更优秀的是 ____________ .
李明 | 张健 | |
投中数 | 30 | 25 |
未中数 | 20 | 15 |
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2 . 十字路口处红绿灯亮灭的情况如下:1分钟亮绿灯;接着10秒亮黄灯;再接着1分钟亮红灯;10秒亮黄灯;1分钟亮绿灯;10秒亮黄灯, ……,则某人开始亮绿灯时,过路口,10分钟后又到此路口,此时应该亮__________ 灯.
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2023-04-06更新
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88次组卷
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3卷引用:1.1周期变化-【基础题】2020-2021学年高一数学北师大2019版第二册
1.1周期变化-【基础题】2020-2021学年高一数学北师大2019版第二册1.1 周期变化 同步课时作业 -2021-2022学年高一下学期数学北师大版(2019)必修(第二册)(已下线)1.1 周期变化7种常见考法归类(1)-【帮课堂】(北师大版2019必修第二册)
3 . 若
,则b=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813b691b272208e63c552741e309079a.png)
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4 . 当a>0时,
等于________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/120b237be8f1d4367c07c3896fa3bfb0.png)
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5 . 将“方程
无实根”改写成含有一个量词的命题的形式,可以写成________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92c4303ebef88f0862f8d625cd5356b.png)
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2023-04-04更新
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203次组卷
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2卷引用:1.2 2.2 全称量词与存在量词-2021-2022学年高一上学期数学北师大版2019必修第一册
6 . 给出四个命题:①偶数都能被2整除;②实数的绝对值大于0;③存在一个实数x,使
;④对顶角相等,其中既是全称量词命题又是假命题的是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b64f8bdfef4484bbf054feb4cb5295cf.png)
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7 . 如图,在矩形ABCD,AB=1,BC=2,
为线段BC上的一动点,且和B,C不重合,连接PA,过点P作PE⊥PA交CD于E,将△PEC沿PE翻折到平面内,使点C恰好落在AD边上的点F,则BP长为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/ea0f28db-0ec9-4b47-88d4-9bda6ba0d1b9.png?resizew=175)
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8 . 如图,在矩形
中,
是
的中点,将
折叠后得到
,延长
交
于点
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/5138d74b-a787-4146-8377-5eaadabc9a0a.png?resizew=176)
①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48cc49beb8b3c8fbb29e69f31e2030c5.png)
________ ;②若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4c0e9fcd7ddeccd70754aa758aad70.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37dcb0289f28b8e5c6aa8e9c1adb804b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e507b71f45a50bf08b2e0894fed1d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/5138d74b-a787-4146-8377-5eaadabc9a0a.png?resizew=176)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48cc49beb8b3c8fbb29e69f31e2030c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3362a45b72536c714c5107b0ae94f1c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4c0e9fcd7ddeccd70754aa758aad70.png)
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9 . 若关于
的一元二次方程
有两个不相等的实数根
,且
.
(1)下列说法正确的有__________ .(将正确选项的序号填在横线上)
①若
,则
,
②
,
③若
,则
,
④若
,则
.
(2)某数学兴趣小组为了增加此题的趣味性,将题目改成:若关于
的方程
有两个不相等的实数根
,且
,其中
均为整数,则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b800b7d6a688abf8a3018c133cec9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5ffa21fddc7c55d35f13435792b2d4.png)
(1)下列说法正确的有
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fe3251e054fe97089806ba7033f802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f75807858b7804a1ad2039c41f323a18.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/badd7f3edb52106b897fe62c9e9ada2e.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d57bdb85ad21a427ebc3126fab41ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c56b1ee18c6809b339d980671b4d09a.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a066bbbcf164565325c66d9e5f500d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc1adacd10539c74b82fc1e6e88ea6f6.png)
(2)某数学兴趣小组为了增加此题的趣味性,将题目改成:若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9c0dce1f975d1203a1bff7580a892d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097f28b6443848c98413364953c37ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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10 . 如图,
两点在双曲线
上,
两点在双曲线
上,若
轴,且
,则
的面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6114947179bed8c2c86ac078e2f8497f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2311a0e8fe086ac4bfa89b75417da00b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ebaa32f4f1f4f807ca9aeb7fb29951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db27d050c1f126c5b94b2e3b22a14f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20cd2fd2fbb51a162b1054b531daaa9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b417db3873f3e6d0e9cd235a4ef685a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/221ac969-cb33-47cb-bbd6-b6a29bd9c582.png?resizew=160)
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