已知:
是最小的正整数,且
、
满足
.
(1)请求出
、
、
的值;
(2)
、
、
所对应的点分别为
、
、
,点
为动点,其对应的数为
,点
在
到1之间运动时(即
时),请化简式子:
;(写出化简过程);
(3)在(1)、(2)的条件下,点
、
、
开始在数轴上运动,若点
以每秒1个单位长度的速度向左运动,同时,点
以每秒2个单位长度,点
以每秒5个单位长度的速度向右运动,3秒钟后,若点
与点
之间的距离表示为
,点
与点
之间的距离表示为
.请求
的值.
![](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/8ccd1736674478e945f21a83ed5a8756.png)
(1)请求出
![](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)
(2)
![](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/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/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/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46800232bd76c00bc7cd92bef26aaf63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3357132ebde5f4f80caad7375108a15a.png)
(3)在(1)、(2)的条件下,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)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5634ee44d1e1316e03bbfc8e4828b15a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/02c4f31a-c28e-4bc1-ba84-19f95fb112d2.png?resizew=212)
更新时间:2021-10-10 19:12:16
|
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【推荐1】如图,数轴上A、B两点对应的数分别为6和10.点P从原点O出发,以每秒3个单位长度的速度沿数轴正方向运动,同时点Q从点A出发,以每秒1个单位长度的速度沿数轴正方向运动.设运动时间为t秒.
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/6/0f490483-7021-4965-8741-ca26a2cb02ab.png?resizew=246)
(1)线段AB的长度是_______,点Q对应的数是_______;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32336c0caa63d7274bc5c16152ea869d.png)
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(0.85)
名校
【推荐2】如图,点A、B是数轴上的两个点,点A表示数
,点B在点A右侧,距离A点
个单位长度,动点P从点A出发,以每秒3个单位长度的速度沿数轴向右匀速运动,设运动时间为1秒.
(1)填空:①数轴上点B表示的数为___________;
②数轴上点P表示的数为___________(用含t的代数式表示);
(2)若另一动点Q从点B出发,以每秒1个单位长度的速度沿数轴向右匀速运动,P、Q同时出发,问点P运动多少秒能追上点Q?
(3)设
的中点分别为点M、N,在点P的运动过程中,线段
的长度是否发生变化?若变化,请说明理由;若不变,求出线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f43677db00ba65a7f96fc49627d70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/b6934c75-2c8f-4347-9707-9263c098403b.png?resizew=173)
(1)填空:①数轴上点B表示的数为___________;
②数轴上点P表示的数为___________(用含t的代数式表示);
(2)若另一动点Q从点B出发,以每秒1个单位长度的速度沿数轴向右匀速运动,P、Q同时出发,问点P运动多少秒能追上点Q?
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82c9797e462254a79db69d7661274b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa29fe6cd9eb51c184f6299d437375cb.png)
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解答题-问答题
|
较易
(0.85)
【推荐1】对于有理数
,
定义一种新运算“
”,规定
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/cdf259cb-762f-4650-840a-3923262681d0.png?resizew=181)
(1)计算
的值;
(2)当
,
在数轴上的位置如图所示时,化简
;
(3)当
,
在数轴上的位置如图所示时,已知
,求
的值.
![](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/091e86ca89e484b331fd90125a5e5af3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd86476f2694289b7c9b21e5a5b2db5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/12/cdf259cb-762f-4650-840a-3923262681d0.png?resizew=181)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459434f2c7ef7dbe00e69818929426f4.png)
(2)当
![](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/226dbe2c9df53c40341b22b5deba3e52.png)
(3)当
![](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/38f1253ae1be3374fa3909631e28f22a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次