2019七年级上·江苏·专题练习
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1 . “
的2倍与
的和”用代数式表示为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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2021-01-23更新
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438次组卷
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5卷引用:北京市中国人民大学附属中学2020-2021学年七年级上学期期末数学试题
北京市中国人民大学附属中学2020-2021学年七年级上学期期末数学试题(已下线)学易密卷:段考模拟君之2018-2019学年七年级数学上学期期末原创卷A卷(江苏)北京市第七中学2021-2022学年七年级上学期期中数学试题浙江省绍兴市新昌县拔茅中学等部分校2023-2024学年七年级上学期期中联考数学试题 浙江省绍兴市新昌县2023-2024学年七年级上学期期末数学试题
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2 . 如图,小区规划在一个长
米,宽
米的长方形场地上修建三条同样宽的甬道,使其中两条与
平行,另一条与
平行,场地的其余部分种草,甬道的宽度为x米.用含a与x的代数式表示草坪的长为_________ 米;宽为__________ 米.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad52beba3181bfc922d5c59d73a5a11a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878e89b6eca35e34c863e832a2c661db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2021/1/18/2638888112242688/2641784307105792/STEM/89b1a7d9-c70b-40a9-9ae2-a983fa34acdc.png)
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3 . 进入初一,李华同学紧跟课堂落实知识,完成作业及时订正,因此对数学运算非常感兴趣,并自主探究了一种新运算“
”,规则如下:对两个有理数a,b,定义![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdb910d56a79fc611ceb1a31d445a8e.png)
(1)计算20
21=_________.
(2)若a1=|x-1|, a2=|x-2|, 若
,则所有满足条件的x的和为___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655c66701407d942ef38d482e6b3ffd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdb910d56a79fc611ceb1a31d445a8e.png)
(1)计算20
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/655c66701407d942ef38d482e6b3ffd7.png)
(2)若a1=|x-1|, a2=|x-2|, 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7dc7334564eadcd0ebfb105a1b1fa11.png)
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4 . 如图,某校的“图书码”共有7位数字,它是由6位数字代码和校验码构成,其结构分别代表“种类代码、出版社代码、书序代码和校验码”.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/41e2ae12-39e5-49b6-a602-e579183555eb.png?resizew=195)
其中校验码是用来校验图书码中前6位数字代码的正确性.它的编制是按照特定的算法得来的.以上图为例,其算法为:
步骤1:计算前6位数字中偶数位数字的和
,即
;
步骤2:计算前6位数字中奇数位数字的和
,即
;
步骤3:计算
与
的和
,即![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f0f7b08949fa0f3f848057ecd8265f8.png)
;
步骤4:取大于或等于
且为10的整数倍的最小数
,即
;
步骤5:计算
与
的差就是校验码
,即
.
请解答下列问题:
(1)《数学故事》的图书码为978753
,则“步骤3”中的
的值为______,校验码
的值为______.
(2)如图①,某图书码中的一位数字被墨水污染了,设这位数字为
,你能用只含有
的代数式表示上述步骤中的
吗?从而求出
的值吗?写出你的思考过程.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/ce9536e0-a808-49ba-adf8-b7b32b938290.png?resizew=416)
(3)如图②,某图书码中被墨水污染的两个数字的差是4,这两个数字从左到右分别是多少?请直接写出结果.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/41e2ae12-39e5-49b6-a602-e579183555eb.png?resizew=195)
其中校验码是用来校验图书码中前6位数字代码的正确性.它的编制是按照特定的算法得来的.以上图为例,其算法为:
步骤1:计算前6位数字中偶数位数字的和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7722c8003c8d72cfe5096976dfa08f3b.png)
步骤2:计算前6位数字中奇数位数字的和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80915782c1d63a5f158b882f97f30427.png)
步骤3:计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9878a063abcb6098d10560f2bf2d4b71.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/4f0f7b08949fa0f3f848057ecd8265f8.png)
![](https://img.xkw.com/dksih/QBM/2020/11/20/2604156327313408/2609889198571520/STEM/4c3961a0432949e7915b1fa0758d09fc.png?resizew=27)
步骤4:取大于或等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7947f9a4462fcabcd30f97f93b379fa.png)
步骤5:计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ddc7b209b50418e2b00c982fcb473d5.png)
请解答下列问题:
(1)《数学故事》的图书码为978753
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
(2)如图①,某图书码中的一位数字被墨水污染了,设这位数字为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/ce9536e0-a808-49ba-adf8-b7b32b938290.png?resizew=416)
(3)如图②,某图书码中被墨水污染的两个数字的差是4,这两个数字从左到右分别是多少?请直接写出结果.
您最近一年使用:0次
2020-12-08更新
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1767次组卷
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16卷引用:北京市海淀区北京一零一中石油分校2021年七年级上学期期末数学试题
北京市海淀区北京一零一中石油分校2021年七年级上学期期末数学试题江苏省南京市秦淮区2020-2021七年级上学期期中考数学试题湖南省长沙市长沙县湖南师大附中星沙实验学校2020-2021学年七年级上学期第一次月考数学试题(已下线)第三章 整式及其加减 单元测试-2021-2022学年七年级数学上册链接教材精准变式练(北师大版)(已下线)期中检测卷(难)-2021-2022学年苏科版七年级数学上册同步单元检测江苏省镇江市2021-2022学年七年级上学期期中数学试题北京市第七中学2021-2022学年七年级上学期期中数学试题(已下线)第13讲 整式的加减-【暑假自学课】2022年新七年级数学暑假精品课(人教版)(已下线)2.2.2 整式的加减(二)(培优三阶练)-2022-2023学年七年级数学上册课后培优分级练(人教版)(已下线)第二章 整式的加减(过关测试)-2022-2023学年七年级数学上册同步精品课堂(人教版)(已下线)江苏七年级上学期期中【压轴44题考点专练】-2022-2023学年七年级数学上学期考试满分全攻略(苏科版)(已下线)江苏七年级上学期期中【常考60题考点专练】-2022-2023学年七年级数学上学期考试满分全攻略(苏科版)广东省深圳市罗湖区翠园东晓中学2021-2022学年七年级上学期期中数学试卷贵州省六盘水市2022-2023学年七年级上学期期中数学试题北京市回民学校2023-2024学年七年级上学期期中数学试题天津北京师范大学静海附属学校2023-2024学年七年级上学期期中数学试题
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5 . 阅读材料:
我们定义:如果两个实数的差等于这两个实数的商,那么这两个实数就叫做“差商等数对”. 即:如果
,那么
与
就叫做“差商等数对”,记为(
,
).
例如:
;
;
;
则称数对(4,2),(
,
),(
,
)是“差商等数对”.
根据上述材料,解决下列问题:
(1)下列数对中,“差商等数对”是 (填序号);
①(
,
),②(
,
)③(-3,-6)
(2)如果(
,4)是“差商等数对”,请求出
的值;
(3)如果(
,
)是“差商等数对”,那么
______________(用含
的代数式表示).
我们定义:如果两个实数的差等于这两个实数的商,那么这两个实数就叫做“差商等数对”. 即:如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ddf391b4308263c6feb152a9c092d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
例如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2cce548f53fed48701dc95e964e0a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc04710db5e7531761e9a5dfbd278f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/540cc45fc75a95821fd1155488ce0604.png)
则称数对(4,2),(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c0874f019492261eb175bdcc08c189d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
根据上述材料,解决下列问题:
(1)下列数对中,“差商等数对”是 (填序号);
①(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b100352ac1eb1df9de0cee90fea4b58c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3aab28a20b5bf47040aaec03b1eb550.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(2)如果(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)如果(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2020-11-25更新
|
1232次组卷
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8卷引用:北京市海淀区首都师范大学附属育新学校2020-2021学年七年级上学期12月月考数学试题
北京市海淀区首都师范大学附属育新学校2020-2021学年七年级上学期12月月考数学试题北京市海淀区北京一零一中石油分校2021年七年级上学期期末数学试题北京市京源学校2020—2021学年八年级上学期期中数学试题重庆市渝北区松树桥中学校2020-2021学年七年级上学期第四学月自主测试数学试题北京市清华大学附属中学朝阳学校2021-2022学年七年级上学期期中数学试题(已下线)专题04 有理数范围内的定义新运算-【微专题】2022-2023学年七年级数学上册常考点微专题提分精练(苏科版)(已下线)七年级上学期期末【压轴82题考点专练】-2022-2023学年七年级数学上学期考试满分全攻略(人教版)(已下线)专题03 实数【六大题型】-【好题汇编】备战2023-2024学年七年级数学下学期期末真题分类汇编(北京专用)
6 . 在数轴上,点
向右移动1个单位得到点
,点
向右移动
(
为正整数)个单位得到点
,点
,
,
分别表示有理数
,
,
.
(1)当
时,点
,
,
三点在数轴上的位置如图所示,
,
,
三个数的乘积为负数.
![](https://img.xkw.com/dksih/QBM/2020/3/27/2428551076675584/2432749409435648/STEM/1d2fe402-02e7-43df-a410-7b903d2ef809.png)
①数轴上原点的位置可能
A.在点
左侧或在
,
两点之间
B.在点
右侧或在
,
两点之间
C.在点
左侧或在
,
两点之间
D.在点
右侧或在
,
两点之间
②若这三个数的和与其中的一个数相等,则
.
(2)将点
向右移动
个单位得到点
,点
表示有理数
,
、
、
、
四个数的积为正数,这四个数的和与其中的两个数的和相等,且
为整数请用含
的代数式表示
,写出推理过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aceb113626093e0e431f30fa45c2c444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c87b351f16728b0023fd63678f8103c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://img.xkw.com/dksih/QBM/2020/3/27/2428551076675584/2432749409435648/STEM/1d2fe402-02e7-43df-a410-7b903d2ef809.png)
①数轴上原点的位置可能
A.在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
B.在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
C.在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
D.在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
②若这三个数的和与其中的一个数相等,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
(2)将点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9097d21a5a0140defb977016a4722280.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2020-04-02更新
|
703次组卷
|
4卷引用:北京市海淀区北京一零一中学2019-2020学年七年级上学期期中数学试题
名校
7 . 某校初一年级计划初中三年每年参加植树活动,2019年已经植树a亩,如果以后每年比上一年植树面积增长20%,那么2021应植树的面积为( )
A.a•(1+20%) | B.a•(1+2×20%) |
C.a•(1+20%)2 | D.2a•(1+20%) |
您最近一年使用:0次
名校
8 . 小蓉在某月的日历上提出了如图所示的四个数a、b、c、d,则这四个数的和可能是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/4850af71-4edd-40ed-8139-2bf72ec5d532.png?resizew=93)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/4850af71-4edd-40ed-8139-2bf72ec5d532.png?resizew=93)
A.24 | B.27 | C.28 | D.30 |
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2019-12-21更新
|
259次组卷
|
8卷引用:北京市海淀区清华大学附属中学2019-2020学年七年级上学期期中数学试题
名校
9 . “
,
两数和的5倍”这句话用代数式可以表示为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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名校
10 . 阅读下列材料:
我们给出如下定义:数轴上给定两点
,
以及一条线段
,若线段
的中点
在线段
上(点
可以与点
或
重合),则称点
与点
关于线段
径向对称.下图为点
与点
关于线段
径向对称的示意图.
![](https://img.xkw.com/dksih/QBM/2019/11/27/2342966972211200/2343129795067904/STEM/b730dc7e107c4e57bd1a663b7b3c2f44.png?resizew=338)
解答下列问题:
如图1,在数轴上,点
为原点,点
表示的数为-1,点
表示的数为2.
![](https://img.xkw.com/dksih/QBM/2019/11/27/2342966972211200/2343129795067904/STEM/5d3062f5c6f242f5988967a3e95c44b5.png?resizew=330)
(1)①点
,
,
分别表示的数为-3,
,3,在
,
,
三点中, 与点
关于线段
径向对称;
②点
表示的数为
,若点
与点
关于线段
径向对称,则
的取值范围是 ;
(2)在数轴上,点
,
,
表示的数分别是-5,-4,-3,当点
以每秒1个单位长度的速度向正半轴方向移动时,线段
同时以每秒3个单位长度的速度向正半轴方向移动.设移动的时间为
(
)秒,问
为何值时,线段
上至少存在一点与点
关于线段
径向对称.
我们给出如下定义:数轴上给定两点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://img.xkw.com/dksih/QBM/2019/11/27/2342966972211200/2343129795067904/STEM/b730dc7e107c4e57bd1a663b7b3c2f44.png?resizew=338)
解答下列问题:
如图1,在数轴上,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2019/11/27/2342966972211200/2343129795067904/STEM/5d3062f5c6f242f5988967a3e95c44b5.png?resizew=330)
(1)①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)在数轴上,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae57e49b519bb89ea02274318a34438d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae57e49b519bb89ea02274318a34438d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
您最近一年使用:0次