对于数轴上的点A,给出如下定义:点A在数轴上移动,沿负方向移动
个单位长度(r是正数)后所在位置点表示的数是
,沿正方向移动
个单位长度(
是正数)后所在位置点表示的数是
与
这两个数叫做“点A的
对称数”,记作
,其中
.例如:原点
表示0,原点
的1对称数是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057eb3c409ecf1ddf06b61a181ac0f04.png)
(1)若点A表示
,请直接写出点A的3对称数.
(2)若
,求点A表示的数和
的值.
(3)若点A表示
,求
的值.
(4)已知
,若点A、点
从原点同时同向出发,且点A的速度是点
速度的2倍,是否存在点A,使数轴上表示
的点与表示
的点之间的距离是数轴上表示
的点与表示
的点之间的距离的2倍,存在,请求出点A表示的数,不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ed7c756c9faa9b9d11255e26065444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0b337670cf636d11866029310683ebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a5abe56c019ac914e1fcde1865a747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057eb3c409ecf1ddf06b61a181ac0f04.png)
(1)若点A表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/175c0077beecf178044081e662a2b3da.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95ccd944ff169d8b6bed4ab2411e19c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
(3)若点A表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f7a31bf9147d44611a124d9c71b357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(4)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aca62f6bf3213041b6ab964dd5f84fa.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2023-12-10 18:42:51
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相似题推荐
解答题-问答题
|
较难
(0.4)
名校
【推荐1】唐代文学家韩愈曾赋诗:“天街小雨润如酥,草色遥看近却无”,当代印度诗人泰戈尔也写道:“世界上最遥远的距离,不是瞬间便无处寻觅;而是尚未相遇,便注定无法相聚”.距离是数学、天文学、物理学中的热门话题,唯有对宇宙距离进行测量,人类才能掌握世界尺度.已知点
,
在数轴上分别表示有理数
,
,
,
两点之间的距离表示为
.例如,在数轴上,有理数3与1对应的两点之间的距离为
;有理数5与
对应的两点之间的距离为
;有理数
与
对应的两点之间的距离为
;…
解决问题:
(1)数轴上有理数
与3对应的两点之间的距离等于_________;数轴上有理数
与
对应的两点之间的距离用含
的式子表示为________;若数轴上有理数
与1对应的两点
、
之间的距离
,求
的值;
联系拓广:
(2)如图,点
表示的数为4,点
表示的数为
,
为数轴上的动点,动点
表示的数为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/f072123d-750d-4dc6-9ab0-0ccbcfab9fb9.png?resizew=232)
①若点
在点
、
两点之间,则
______;若
,则点
表示的数
为______;由此可得:当
取最小值时,求整数
的所有取值的和;
②当点
到点
的距离等于点
到点
的距离的2倍时,求
的值.
![](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/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.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/7d394f3eaf0cbab7fd5799d3da5755b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0f3a2c1da4845b891e70f59e6f3e3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4af626a8f2eff4f8a4f08242eb0bddc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf3d3564c61e5e9c39a9e2cf2de048b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deb6b39cf7d6321f1d735475f1043e31.png)
解决问题:
(1)数轴上有理数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e22e1223baf7cb3d53e668c2449609.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0907a673d52825cd7df84b400972d4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
联系拓广:
(2)如图,点
![](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/274a9dc37509f01c2606fb3086a46f4f.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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/f072123d-750d-4dc6-9ab0-0ccbcfab9fb9.png?resizew=232)
①若点
![](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/ddb8f557579bf0d449e0d5647c7ca575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73fd855175b196236e993a801f7a5212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e5733394a7375e39776bdb695a7637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②当点
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐2】如图1,数轴上的点
、
、
分别表示数
、0、
,且
,
满足
.电子跳蚤
从点
出发,沿着数轴以每秒4个单位的速度向点
点方向运动;电子跳蚤
从点
出发,沿着数轴以每秒2个单位长度的速度向
点方向运动.电子跳蚤
与
同时出发,运动的时间为
秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/c44ad9d8-b4ee-4b00-8b40-5acd59c46591.png?resizew=455)
(1)填空:
________,
________,当
________秒时,点
与点
重合;
(2)当点
与点
相距20个单位长度时,求
的值;
(3)若在原点
的左边2个单位处放一挡板
(如图2),电子跳蚤
、
在碰到挡板
后,分别以原来的速度向相反的方向运动,写出
的值.(若有必要,用含
的代数式表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8914be180491706f1f848c310a0dc945.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/afe02c08a9f51a63fe6e696c46abf1f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/10/c44ad9d8-b4ee-4b00-8b40-5acd59c46591.png?resizew=455)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)若在原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52457dd7e1e7abaafa599c9ed388bba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐1】大家知道
、它在数轴上的意义是表示数
的点与原点(即表示
的点)之间的距离,又如式子
,它在数轴上的意义是表示数
的点与表示数
的点之间的距离.
(1)在数轴上的意义是表示数
的点与表示数
的点之间的距离的式子是____.
(2)反过来,式子
在数轴上的意义是 .
(3)试用数轴探究:当
时
的值为 .
(4)进一步探究:
的最小值为 ,此时
的取值范围为 .
(5)最后发现,当
的值最小时,
的值为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c67382ce300768ceb334dac2af03aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812b226d645c102ec1947093798c68ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
(1)在数轴上的意义是表示数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
(2)反过来,式子
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a0f7037071fe62b155a2896156558cd.png)
(3)试用数轴探究:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f971a2ecf2e17fbaff2f3af4896ece48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(4)进一步探究:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3522cf8dc67953a803cf611a79cb3095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(5)最后发现,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd71f1b8044d25994ad94b010225d6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】阅读理解:
例1.解方程|x|=2,因为在数轴上到原点的距离为2的点对应的数为±2,所以方程|x|=2的解为x=±2.
例2.解不等式|x﹣1|>2,在数轴上找出|x﹣1|=2的解(如图),因为在数轴上到1对应的点的距离等于2的点对应的数为﹣1或3,所以方程|x﹣1|=2的解为x=﹣1或x=3,因此不等式|x﹣1|>2的解集为x<﹣1或x>3.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/6323e167-c8c1-46e4-81aa-990c0da70ca7.png?resizew=231)
参考阅读材料,解答下列问题:
(1)方程|x﹣2|=3的解为 ;
(2)解不等式:|x﹣2|≤1.
(3)解不等式:|x﹣4|+|x+2|>8.
(4)对于任意数x,若不等式|x+2|+|x﹣4|>a恒成立,求a的取值范围.
例1.解方程|x|=2,因为在数轴上到原点的距离为2的点对应的数为±2,所以方程|x|=2的解为x=±2.
例2.解不等式|x﹣1|>2,在数轴上找出|x﹣1|=2的解(如图),因为在数轴上到1对应的点的距离等于2的点对应的数为﹣1或3,所以方程|x﹣1|=2的解为x=﹣1或x=3,因此不等式|x﹣1|>2的解集为x<﹣1或x>3.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/6323e167-c8c1-46e4-81aa-990c0da70ca7.png?resizew=231)
参考阅读材料,解答下列问题:
(1)方程|x﹣2|=3的解为 ;
(2)解不等式:|x﹣2|≤1.
(3)解不等式:|x﹣4|+|x+2|>8.
(4)对于任意数x,若不等式|x+2|+|x﹣4|>a恒成立,求a的取值范围.
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【推荐3】小明同学在探究函数
的图象和性质时经历以下几个学习过程:
(I)列表(完成以下表格).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/31/194eaa87-42ee-4ff4-b7ed-a99aa9dc0193.png?resizew=412)
(II)描点并画出函数图象草图(在备用图①中描点并画图).
(Ⅲ)根据图象解决以下问题:
(1)观察图象:函数
的图象可由函数
的图象如何变化得到?答: .
(2)探究发现直线
与函数
的图象交于点E,F,
,
,则不等式
的解集是______.
(3)设函数
的图象与x轴交于A,B两点(B位于A的右侧),与y轴交于点C.
①求直线
的解析式;
②探究应用:将直线
沿y轴平移m个单位长度后与函数
的图象恰好有3个交点,求此时m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf89218a0e96e92d6f066233b1c885.png)
(I)列表(完成以下表格).
x | … | -2 | -1 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | … |
… | 15 | 8 | 0 | 0 | 3 | 15 | … | ||||
… | 15 | 8 | 0 | 0 | 3 | 15 | … |
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/31/194eaa87-42ee-4ff4-b7ed-a99aa9dc0193.png?resizew=412)
(II)描点并画出函数图象草图(在备用图①中描点并画图).
(Ⅲ)根据图象解决以下问题:
(1)观察图象:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf89218a0e96e92d6f066233b1c885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a32d30dc00f0bac2ac24ac33155e02bb.png)
(2)探究发现直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971751ce826c71fb6ec79969d45a9fdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf89218a0e96e92d6f066233b1c885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c298e643af21bbdf83ff8485d57d4fb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5435e961f2e099e8368f79e455c14a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf90e341c48b65ffc9c71255218dd4fb.png)
(3)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf89218a0e96e92d6f066233b1c885.png)
①求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
②探究应用:将直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf89218a0e96e92d6f066233b1c885.png)
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【推荐1】已知,
,
,
三点在数轴上的位置如图所示,它们表示的数分别是
,
,
且
,点
到点
、
的距离相等
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/13/ccab4b84-c6e8-4df2-94cf-e1b15db22d8d.png?resizew=191)
(1)求
,
之间的关系
(2)若
,数轴上点
对应的数为
,满足
,求
的值若若
(3)若数轴上
,
两点之间的动点
对应的数为
,当
点在运动的过程中,
的值保持不变,求
的值.
![](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://staticzujuan.xkw.com/quesimg/Upload/formula/d8cbb247c6ed56338bb6750b9e23bf56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/13/ccab4b84-c6e8-4df2-94cf-e1b15db22d8d.png?resizew=191)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86807f1491c3a26432b7ae6d973fa147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbf06042acac01d46a12ee5b53ee47d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若数轴上
![](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/dad2a36927223bd70f426ba06aea4b45.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/5cfd81bb2f56dcd99700d33a5fc64244.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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【推荐2】学习过绝对值之后,我们知道
表示5与2的差的绝对值,实际上也可理解为5与2两数在数轴上所对应的两点之间的距离.试探究解决以下问题:
(1)
可以理解为_________与_________两数在数轴上所对应的两点之间的距离;
(2)已知
,求x的值;
(3)利用数轴探究:
①满足
的所有整数x的值为_________;
②当x满足_________时,
的值最小最小值是_________;
(4)已知在一条笔直的高速公路旁边依次有A、B、C三个城市,它们距离高速公路起点的距离分别是
、
、
.现在需要在该公路旁建一个物流集散中心P,请直接指出该物流集散中心P应该建设在何处,才能使得P到三个城市的距离之和最小,这个最小距离是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2183f6f694628f28b403ae302aca670.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e5d9b7040fbbda2679f2601e589569.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6320cb33988acd1c8bf824be1b21f4e.png)
(3)利用数轴探究:
①满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10458b3abcc1c7489ce16120f7aaa5f6.png)
②当x满足_________时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa5156e49f56492f94f253dce5098c3f.png)
(4)已知在一条笔直的高速公路旁边依次有A、B、C三个城市,它们距离高速公路起点的距离分别是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490063188307638becfc418265e0edaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672940a442e9ed34573fef124b3445a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ed73d867379f6dcae9dbf82366408c.png)
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名校
【推荐1】如图1,数轴上有A,B,C三个点,点C对应的数是12,点A,B对应的数分别为a、b,且a,b满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/4d0de277-de75-4e39-87dd-89708f223e8d.png?resizew=370)
(1)A对应的数为___________,B对应的数为___________;
(2)若数轴上有动点E从A出发,以5每秒单位长度的速度沿数轴正方向匀速运动,同时动点F从B出发,以每秒2单位长度的速度沿数轴负方向匀速运动.在运动过程中,是否存在线段
的长度等于线段
长度的
,若存在,请求出此时点E对应的数,若不存在,请说明理由;
(3)如图2,在数轴上有长度为4个单位长度的线段
(点
在点
的左侧,且点
与点
重合)和长度为3个单位长度的线段
(点
在点
的左侧,且点
与点
重合).若
从点
出发,以每秒5个单位长度的速度沿着数轴的正方向运动,同时
从点
出发,以每秒1个单位的速度也沿着数轴的正方向运动.当点
运动到点
时,线段
立即以原来速度的
返回,同一时刻
的速度变为原来的2倍,当点
再次运动到点
时,线段
和
均同时停止运动.设
出发的时间为
,在整个运动过程中,是否存在时间
使两条线段重叠部分的长度为
长度的一半,若存在,请求
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71dff5a71d4f800987102ab794a1698.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/11/4d0de277-de75-4e39-87dd-89708f223e8d.png?resizew=370)
(1)A对应的数为___________,B对应的数为___________;
(2)若数轴上有动点E从A出发,以5每秒单位长度的速度沿数轴正方向匀速运动,同时动点F从B出发,以每秒2单位长度的速度沿数轴负方向匀速运动.在运动过程中,是否存在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c4eccda4edcee29a5f15609e85106df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
(3)如图2,在数轴上有长度为4个单位长度的线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】如图1,已知数轴上的点A对应的数是a,点B对应的数是b,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/26/f4ca36a4-5537-4ba1-82ef-e0a0d95cd17f.png?resizew=389)
(1)
______,
______,数轴上到点A、点B距离相等的点C对应的数为______.
(2)动点P从点A出发,以2个单位长度/秒的速度向右运动,设运动时间为t秒,问:是否存在某个时刻t,恰好使得P到点A的距离是点P到点B的距离的3倍?若存在,请求出t的值;若不存在,请说明理由.
(3)如图2,在数轴上的点M和点N处各竖立一个挡板(点M在原点左侧,点N在原点右侧),数轴上甲、乙两个弹珠同时从原点出发,甲弹珠以
个单位长度/秒的速度沿数轴向左运动,乙弹珠以1个单位长度/秒的速度沿数轴向右运动.两弹珠遇到挡板后均立即以原速度向反方向运动,若甲、乙两个弹珠第一次相遇的位置恰好到点M和点N的距离相等.试探究点M对应的数与点N对应的数是否满足某种数量关系,请写出它们的关系式,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2c3e0dde1a3b72339ea774a66c68cd3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/26/f4ca36a4-5537-4ba1-82ef-e0a0d95cd17f.png?resizew=389)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)动点P从点A出发,以2个单位长度/秒的速度向右运动,设运动时间为t秒,问:是否存在某个时刻t,恰好使得P到点A的距离是点P到点B的距离的3倍?若存在,请求出t的值;若不存在,请说明理由.
(3)如图2,在数轴上的点M和点N处各竖立一个挡板(点M在原点左侧,点N在原点右侧),数轴上甲、乙两个弹珠同时从原点出发,甲弹珠以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8f58755aee89fb2cf72ba518dcee2a.png)
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【推荐3】如图,将等边
放在数轴上,点B与数轴上表示
的点重合,点C与数轴上表示2的点重合,将数轴上C点右侧的数轴沿
进行折叠、经过折叠后,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/c1dadb02-d0fc-40ea-868b-d18715743fa2.png?resizew=348)
(1)点A、点B分别与坐标轴上表示哪个数的点重合?
(2)若点D为
的中点,点E表示
折叠数轴上,记
为数轴拉直后点E到点A的距离,即
,其中
代表线段长度.若动点P从点D出发,沿
方向运动,动点Q从点E出发,沿
方向运动,当动点Q运动到点C时,P、Q同时停止运动.已知动点P在DC上运动速度为1单位/秒,在
上运动速度为2单位/秒;动点Q的运动速度为1单位/秒,设运动时间为t(秒).
①当t为何值时,动点P、Q表示同一个数.
②当t为何值时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01317332a203c898536b1d0459f51d23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2410ff5236b24ff24f2cb54c8e733f5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/c1dadb02-d0fc-40ea-868b-d18715743fa2.png?resizew=348)
(1)点A、点B分别与坐标轴上表示哪个数的点重合?
(2)若点D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e35e926bed5a9f909e9c1ef60e97afab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a792c7878e2138a0a92705acae3ed9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b87af0b2214fce2ef7296ee4032146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963e18a44d9e95c1ba2f1188115876d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddeb7da58ea6cd4d3c56082da60d8916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
①当t为何值时,动点P、Q表示同一个数.
②当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/185cbdcbc42db458fd66c0467faf1c6a.png)
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