如图,射线
上有三点A,B,C,满足
,
,
.点P从点O出发,沿
方向以
/秒的速度匀速运动,点Q从点C出发在线段
上向点O匀速运动,两点同时出发,当点Q运动到点O时,点P,Q停止运动.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/a44c6df8-1425-4c47-98d7-e419011e6126.png?resizew=230)
(1)若点Q运动速度为
/秒,经过多长时间P,Q两点相遇?
(2)当
时,点Q运动到的位置恰好是线段
的中点,求点Q的运动速度.
(3)自点P运动到线段
上时,分别取
和
的中点E,F,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a3aa3b976658d3df2a27a4a008fe4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9018fd90522f3e6df4fbdf3c1b88d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d4bc1be051f904d4a6e06dc825395b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc93e193fad261689949a52819753f0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/a44c6df8-1425-4c47-98d7-e419011e6126.png?resizew=230)
(1)若点Q运动速度为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26b6c343e023ace263d087a8b8bf1fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
(3)自点P运动到线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e504a528ed198ea43118ed6ebd67f7b3.png)
更新时间:2024-01-15 19:03:12
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【推荐1】已知A、B两点在数轴上所对应的数分别用a,b表示,且
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/bd4f7a0b-fed7-45b5-a4c4-32a5fb69fdd6.png?resizew=250)
(1)在如图所示的数轴上,点A表示的数是___,点B表示是数是___;
(2)如果两个动点P、Q分别从点A、原点O同时出发,并沿数轴正方向开始运动,动点P、Q的运动速度分别为3个单位长度/秒,1个单位长度/秒,设点Q的运动时间为t秒,
①点P表示的数为___,点Q表示的数为___.(用含t的式子表示)
②当t为何值时,点P、Q与点B的距离相等.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bb1ce8a1730374f581515e1557da1db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/bd4f7a0b-fed7-45b5-a4c4-32a5fb69fdd6.png?resizew=250)
(1)在如图所示的数轴上,点A表示的数是___,点B表示是数是___;
(2)如果两个动点P、Q分别从点A、原点O同时出发,并沿数轴正方向开始运动,动点P、Q的运动速度分别为3个单位长度/秒,1个单位长度/秒,设点Q的运动时间为t秒,
①点P表示的数为___,点Q表示的数为___.(用含t的式子表示)
②当t为何值时,点P、Q与点B的距离相等.
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【推荐2】已知数轴上三点
,
,
对应的数分别为
,
,
,点
为数轴上任意一点,其对应的数为
.
(1)如果点
到点
,点
的距离相等,那么
的值是________;
(2)数轴上是否存在点
,使点
到点
,点
的距离之和是
?如果存在,请求出
的值;如果不存在,请说明理由;
(3)如果点
以每秒
个单位长度的速度从点
向右运动时,点
和点
分别以每秒
个单位长度和每秒
个单位长度的速度也向右运动,且三点同时出发,那么经过几秒,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.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/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)如果点
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)数轴上是否存在点
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b06e95b57b7a81cd81d05557a11fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)如果点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca080a74a5ba4856ed06e6647e49800.png)
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【推荐1】在数轴上,若C到A的距离刚好是3,则C点叫做A的“幸运点”,若C到A、B的距离之和为6,则C叫做A、B的“幸运中心”.
(1)如图1,点A表示的数为
,则点A的幸运点C所表示的数应该是__________;
(2)如图2,A,B,P为数轴上三点.点A所表示的数为
,点B所表示的数为3,点P所表示的数为8,现有一只电子蚂蚁从点P出发,以2个单位每秒的速度向左运动,当经过多少秒时,该蚂蚁所在的点是点A、B的幸运中心?
(3)如图3,在数轴上,点A所表示的数是a,点B所表示的数是b,且
,点P是A、B两点的幸运中心,点Q是点A的幸运点,求P、Q两点距离的最小值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/20/c3ee96c7-03ca-452b-bb14-6beae59c4b5b.png?resizew=230)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/20/79143971-92f7-4a1b-b01b-002791874bb8.png?resizew=262)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/19/8e87848c-4ef4-4a0b-9458-6a9e1e10e8a5.png?resizew=126)
(1)如图1,点A表示的数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
(2)如图2,A,B,P为数轴上三点.点A所表示的数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
(3)如图3,在数轴上,点A所表示的数是a,点B所表示的数是b,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae42eddb4fd8575b4e8b04f5b88173f8.png)
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【推荐2】在平面直角坐标系中,一次函数
的图象交
轴,
轴分别于
,
两点,交直线
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/9d3a6e7d-08f5-4e88-af00-c98368c61ad1.png?resizew=268)
(1)求点
,
的坐标;
(2)若
,求
的值;
(3)在(
)的条件下,
是线段
上一点,过点
作
轴的垂线,与
轴交于点
,与直线
交于点
,若
,求
点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9118cc77fc0a045337745890e50cad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/9d3a6e7d-08f5-4e88-af00-c98368c61ad1.png?resizew=268)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42f22ac48a62b9e832fac24e27fe32b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)在(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efdbb08b8aa3b56843853cf37664615b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐1】A、B两地相距64千米,甲从A地出发,每小时行14千米,乙从B地出发,每小时行18千米
(1)若两人同时出发相向而行,则需经过几小时两人相遇?
(2)若甲在前,乙在后,两人同向而行,则几小时后乙追上甲?
(1)若两人同时出发相向而行,则需经过几小时两人相遇?
(2)若甲在前,乙在后,两人同向而行,则几小时后乙追上甲?
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【推荐2】甲、乙两人从A,B两地同时出发,沿同一条路线相向匀速行驶,已知出发后经3小时两人相遇,相遇之时乙比甲多行驶了60千米、相遇后再经1小时乙到达A地.
求:甲、乙两人的速度分别是多少?
求:甲、乙两人的速度分别是多少?
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