如图,数轴上点A表示a,a是多项式
的二次项系数,点B表示b是绝对值最小的有理数,点C表示c,单项式
的次数为c.
(1)依题意
,
,
.
(2)若点P从A点出发沿数轴向右运动,速度为每秒2个单位长度,点Q从点C出发沿数轴向左运动,速度为每秒1个单位长度,P、Q两点同时出发,在点D处相遇,D点所表示的有理数是
(3)在(2)的条件下,P、Q两点相遇后继续运动,点P运动到点C时返回(点P返回A处Q也停止运动),求P、Q相遇后再经过多少秒P、Q两点的距离为6(直接写出结果).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1cca47d207a23fa204912dd5dfb9f06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cfb5a2c496295cc449e1e4b02d81ee1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/30/3bd583b9-9766-4909-bdfc-baab1edfbfdc.png?resizew=301)
(1)依题意
![](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/f4e9bb42376c12d7d21702ae8062b25a.png)
(2)若点P从A点出发沿数轴向右运动,速度为每秒2个单位长度,点Q从点C出发沿数轴向左运动,速度为每秒1个单位长度,P、Q两点同时出发,在点D处相遇,D点所表示的有理数是
(3)在(2)的条件下,P、Q两点相遇后继续运动,点P运动到点C时返回(点P返回A处Q也停止运动),求P、Q相遇后再经过多少秒P、Q两点的距离为6(直接写出结果).
更新时间:2023-12-10 19:05:01
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相似题推荐
解答题-问答题
|
适中
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【推荐1】如图,点
,
,
是数轴上三点,点
表示的数为
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/0b809858-1360-4705-816d-d184ea482599.png?resizew=348)
(1)写出数轴上点
表示的数:______;
(2)动点
,
同时从
,
出发,点
以每秒
个单位长度的速度沿数轴向右匀速运动,点
以每秒
个单位长度的速度沿数轴向左匀速运动,设运动时间为
(
)秒.
①当
时,求出此时
,
在数轴上表示的数;
②
为何值时,点
,
相距
个单位长度,并写出此时点
,
在数轴上表示的数.
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/0b809858-1360-4705-816d-d184ea482599.png?resizew=348)
(1)写出数轴上点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)动点
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.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/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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【推荐2】数轴上有不同两点
,
,点
表示的数为
,点
表示的数为
.
(1)若点
表示的数的相反数是
,求点
表示的数.
(2)若点
与点
之间的距离为6,且点
在点
的右侧,求
的值.
(3)在(1)的条件下,在数轴上有两动点
,
,若动点
从点
出发向点
运动,同时动点
从点
出发向点
运动,经过2秒相遇;若动点
从点
出发向点
运动,同时,动点
从点
出发与点
同向运动,经过6秒相遇,求
点与
点的运动速度.
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b482df9046a13963befb97f3167768de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a960e7bc045efb3966d50791f26f0248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/15/92f48cb4-4376-4557-be9c-901b0e59ce48.png?resizew=409)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b9a5f1362c12e1ea8f6fc0d9d787ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若点
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)在(1)的条件下,在数轴上有两动点
![](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/dad2a36927223bd70f426ba06aea4b45.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/acc290b44635265137fdf13146b6a6d9.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/dad2a36927223bd70f426ba06aea4b45.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/acc290b44635265137fdf13146b6a6d9.png)
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名校
【推荐3】先阅读,后探究相关的问题
【阅读】
表示5与2差的绝对值,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;
可以看作
,表示5与
的差的绝对值,也可理解为5与
两数在数轴上所对应的两点之间的距离.
(1)如图,先在数轴上画出表示点
的相反数的点
,再把点
向左移动
个单位,得到点
.则点
和点
表示的数分别为__________和__________,
,
两点间的距离是__________;
(2)数轴上表示
和
的两点
和
之间的距离表示为__________;如果
,请求出
的值.
(3)若点
表示的整数为
,则当
为__________时,
与
的值相等;
(4)若
为整数,且使代数式
取最小值时,请写出满足条件的整数
的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/22/bc95434f-20d4-4a62-9c9d-97bf9f64b4aa.png?resizew=376)
【阅读】
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d9f22e0bb3333b34e25dc044351e7f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bf8dd39e95e7d1187e7ba68dc9027d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f29ef7641faf29359fa111ed91e1894e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
(1)如图,先在数轴上画出表示点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212d6e1f4d7dcc0e5e902c46e3b1dfcc.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/fb8f58755aee89fb2cf72ba518dcee2a.png)
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)数轴上表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.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/c5f23420529a6a808d22d454e87a6194.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/cd93a543e10faf54f9657fe8754b810d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8428e1197c640372a3e7984182bc4e.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e59970ce74dcbf5526e636c782eea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐1】已知数轴上点A与点B的距离为12个单位长度,点A在原点左侧,到原点距离为22个单位长度.点B在点A的右侧,点C表示的数与点B表示的数互为相反数,动点P从A出发,以每秒1个单位的速度向终点C运动,设运动时间为t秒.
(1)点A表示的数为_______,点B表示的数为_______,点C表示的数为_______;
(2)用含t的代数式表示点P到点A和点C的距离:
_____,
______;
(3)当点P运动到点B时,点Q从A点出发,以每秒4个单位长度的速度向C点运动,Q点到达C点后,再立即以同样的速度返回,运动到终点A.
①在点Q向点C运动过程中,能否追上点P?若能,请求出此时点P表示的数.
②在点Q开始运动后,P、Q两点之间的距离能否为2个单位?如果能,请求出此时t的值;如果不能,请说明理由.
(1)点A表示的数为_______,点B表示的数为_______,点C表示的数为_______;
(2)用含t的代数式表示点P到点A和点C的距离:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5745e2dc1d5308872c68ae932cd13ffa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33e7d551cca653e2d638c8cab4c2fda8.png)
(3)当点P运动到点B时,点Q从A点出发,以每秒4个单位长度的速度向C点运动,Q点到达C点后,再立即以同样的速度返回,运动到终点A.
①在点Q向点C运动过程中,能否追上点P?若能,请求出此时点P表示的数.
②在点Q开始运动后,P、Q两点之间的距离能否为2个单位?如果能,请求出此时t的值;如果不能,请说明理由.
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名校
【推荐2】已知代数式
是关于
的二次多项式,且二次项系数为
,数轴上
,
两点所对应的数分别是
和
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/5/9cedc4a2-b907-4f7f-ad70-8a0eb35e24fa.png?resizew=414)
(1)
______,
______.
(2)有一动点
从点
出发第一次向左运动1个单位长度,然后在新的位置第二次向右运动2个单位长度,再在此位置第三次向左运动3个单位长度…,按照如此规律不断地左右运动,当运动到第2023次时,点
所对应的数为______.
(3)若点
以每秒2个单位长度的速度向左运动,同时,点
以每秒3个单位长度的速度向右运动.动点
从原点开始以每秒
个单位长度的速度向左运动,当点
与点
重合时,点
停止运动.在运动过程中,
的值始终保持不变,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c24647e5bf86963db884bb64398b3f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/5/9cedc4a2-b907-4f7f-ad70-8a0eb35e24fa.png?resizew=414)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)有一动点
![](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/dad2a36927223bd70f426ba06aea4b45.png)
(3)若点
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93a232c88870d213a7b74a796a1ff4b.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd2b11fa14e3a85d89ead410f2645667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】已知关于x、y的代数式:
,
,且代数式
.
(1)若
,
时,化简代数式M;
(2)若代数式M是关于x、y的一次多项式,求
的值;
(3)已知
,
求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98498dd0b18e930b35dc70f23f667303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db7c040dc99a27d89e51ebe6d7031407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/805dfe919713e1b67ef367f1c7e34e5b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8e1dd8da540badcb9a8f427c5b202e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
(2)若代数式M是关于x、y的一次多项式,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e802b20507cbd03cac7562d1acb16f71.png)
求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f9cfe2b52b1388cbbd874daa43db60.png)
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【推荐3】如图,在数轴上,点
、点
所表示的数分别为
、
,其中,
是多项式
的次数的相反数,
是该多项式的项数的3倍.动点
从点
出发,沿着数轴以每秒2个单位的速度匀速向右运动,同时,动点
从点
出发,沿着数轴以每秒4个单位的速度匀速向左运动.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/18/ab9d11e0-69b2-45ab-8831-a69c54d16daa.png?resizew=258)
(1)则
________,
________.
(2)经过多少秒钟,点
、点
、点
满足相邻两个点的距离相等?
(3)点
为原点,在数轴上,我们用
表示点
与点
之间的距离,
表示点
与点
距离,那么在运动过程中,
的值是否为定值?若是,请求出这个定值,若不是,请说明理由.
![](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/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/a3379e3230c7ae1fe83733b72a04cda5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/18/ab9d11e0-69b2-45ab-8831-a69c54d16daa.png?resizew=258)
(1)则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)经过多少秒钟,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/dbdf5b428d51483e87bc6586c5af5b16.png)
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【推荐1】甲、乙两人在相距18千米的A、B两地相向而行,乙的速度是甲的速度的2倍,两人同时出发
小时后相遇,请问甲的速度是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/742145c3bfb5281e2e583e6405a3d4ee.png)
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【推荐2】2023年世界泳联跳水世界杯在西安奥体中心举行,小亮和姐姐周末去观赛,姐姐骑共享单车保持匀速从家到奥体中心看比赛,到达赛场后看比赛用了
,看完比赛后骑车以同样的速度沿原路返回家中,姐姐从家出发的同时小亮刚看完上一场比赛从奥体中心步行返回家中,结果比姐姐早
到家,姐姐从家出发开始计时,两人离家的距离
与所用时间
之间的关系图像如图所示,请结合图像信息解答下列问题:
(1)
_______________,
______________;
(2)求出姐姐从家前往奥体中心的过程中,姐姐离家的距离
与时间
之间的关系式;
(3)在姐姐去奥体中心的过程中,
为何值时,两人相距
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b29f60fc3d32ca94740f0adf3fd0b53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f46b9f12e41cb337c6538e501d37a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f38197c34c42e180eac825662efd62d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0fe078823d44ad59b3048bb5bc39d8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/12/fb5b2983-74f3-4176-86c3-c04b89a6d9a5.png?resizew=184)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)求出姐姐从家前往奥体中心的过程中,姐姐离家的距离
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)在姐姐去奥体中心的过程中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f05ba29eb90358e2211e1f7ba6423fa2.png)
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