如图,在数轴上有A,B,C,D四点,点A表示的数是1,点B表示的数是7,点C位于点B的左侧并与点B的距离是2,点D是线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/c4675e40-d25c-4249-be1a-61c0f9aac0f5.png?resizew=438)
(1)在数轴上表示出点C,点D,直接写出点D表示的数;
(2)若点E在数轴上,且满足
,求点E是表示的数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/26/c4675e40-d25c-4249-be1a-61c0f9aac0f5.png?resizew=438)
(1)在数轴上表示出点C,点D,直接写出点D表示的数;
(2)若点E在数轴上,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f9336bb5bf93d58e2295e13074a142c.png)
更新时间:2024-01-09 10:48:40
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【推荐1】操作与探究
对数轴上的点
进行如下操作:先把点
表示的数乘以
,再把所得数对应的点向右平移1个单位,得到点
的对应点
.
如图1,点
,
在数轴上,对线段
上的每个点进行上述操作后得到线段
,其中点A,
的对应点分别为
,
.
(1)若点A表示的数是
,点
表示的数是______;
(2)若点
表示的数是2,点
表示的数是______;
(3)已知线段
上的点
经过上述操作后得到的对应点
与点
重合,则点
表示的数是______
(4)保持前两问的条件不变,点
是线段
上的一个动点,以点
为折点,将数轴向左对折,点
的对应点落在数轴上的
处,若
,求点
表示的数.
对数轴上的点
![](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/d3ffd5c35bba71ea54c28622b6cf505d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/26/b31a7c7b-44c3-46ce-a334-92d064a34084.png?resizew=350)
如图1,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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb0628cecbfc98d390e5447d52414e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
(1)若点A表示的数是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(3)已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b1a5427d8ff23df0f3ec194756c84c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(4)保持前两问的条件不变,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5aa6ddaf33aa5d12aaf1120423f242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐2】在数轴上表示下列各数:(﹣2)2,﹣(﹣1),﹣|﹣2|,0,并用“≤”把各数连接起来.
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【推荐1】已知有理数a,b,c在数轴上对应的点分别为A,B,C,且满足
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/5cf17dbf-dba9-4800-9c87-025e6d98073e.png?resizew=343)
(1)分别求a,b,c的值;
(2)若点D在数轴上对应的数为x,当A、D间距离是B、C间距离的4倍时,请求出x的值;
(3)若点A和点B分别以每秒2个单位长度和每秒1个单位长度的速度在数轴上同时向右运动,设运动时间为t秒,是否存在一个常数k,使得
的值在一定时间范围内不随运动时间t的改变而改变?若存在,求出k的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/542288d84d57e605e532c6388157d5e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f40cb2fe6069dfc49b35039da5c4c7b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/5cf17dbf-dba9-4800-9c87-025e6d98073e.png?resizew=343)
(1)分别求a,b,c的值;
(2)若点D在数轴上对应的数为x,当A、D间距离是B、C间距离的4倍时,请求出x的值;
(3)若点A和点B分别以每秒2个单位长度和每秒1个单位长度的速度在数轴上同时向右运动,设运动时间为t秒,是否存在一个常数k,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c9bd91547c278fbd210305a60df42e0.png)
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【推荐2】如图所示,观察数轴,请回答:
(1)点
与点
的距离为______,点
与点
的距离为______;点
与点
的距离为______,点
与点
的距离为______;
(2)发现:在数轴上,如果点
与点
分别表示数
,
,则它们之间的距离可表示为
______.(用
,
表示):
(3)利用发现的结论,逆向思维解决下列问题:
①数轴上表示
的点
与
之问的距离是1,则
的值是______;
②
,则
______;
③
的最小值为______.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/18/fa9e8d8c-32df-4f2a-81b3-1fb473ebe886.png?resizew=345)
(1)点
![](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/7f9e8449aad35c5d840a3395ea86df6d.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)发现:在数轴上,如果点
![](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/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2b3247afa684b10c8e1da99cf33d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(3)利用发现的结论,逆向思维解决下列问题:
①数轴上表示
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acae52f8e1260171b3eed5e03322bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827c5c3a9ca93c9598cd2502b73dd3fb.png)
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【推荐1】如图,点A、B、C、D在同一直线上,且AB:BC:CD=2:3:5.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/59598373-5e28-4551-b1e4-f462d4a3aa65.png?resizew=217)
(1)若AD=30,求BC的长;
(2)若点M、N是AC、CD中点,且AD=a,求MN的长.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/59598373-5e28-4551-b1e4-f462d4a3aa65.png?resizew=217)
(1)若AD=30,求BC的长;
(2)若点M、N是AC、CD中点,且AD=a,求MN的长.
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【推荐2】如图所示,点C为线段AB的中点,点E为线段AB上的点,点D为线段AE的中点,若
,
,求线段CE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dd90bfa2987b84df430498021d5f648.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d379ef9a50ae13b4264559ddd64da4.png)
![](https://img.xkw.com/dksih/QBM/2020/12/24/2621099040202752/2622691096657920/STEM/0ed800f9-dc97-4f09-a98b-63e34bb0aa57.png)
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