已知一次函数
的图像与
轴、
轴分别相交于点
、
,点
在该函数图像上,
到
轴、
轴的距离分别为
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/4eb1ca8e-552e-4064-abb4-10396cf7258b.png?resizew=259)
(1)当
为线段
的中点时,求
的值;
(2)直接写出
的范围,并求当
时点
的坐标;
(3)若在线段
上存在无数个
点,使
(
为常数),求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c30fd97fafb3779aa4f4660f41e2939.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/dad2a36927223bd70f426ba06aea4b45.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edf900c810371fb21297c15f86d8743.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31ac1def558351e2e3ed1235c570530.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/4eb1ca8e-552e-4064-abb4-10396cf7258b.png?resizew=259)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a4b32d388558eb9a9e4f0f2dd57c09.png)
(2)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a4b32d388558eb9a9e4f0f2dd57c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdbd55c81def8abefc2e311c5fcef87f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e0a0cbcd3ea645ce413cebb08eb65a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
2023八年级下·全国·专题练习 查看更多[5]
(已下线)专题19.50 一次函数(全章复习与巩固)(知识讲解)-2022-2023学年八年级数学下册基础知识专项讲练(人教版)2023年浙江省绍兴市新昌县回山中学中考一模数学试题(已下线)第03讲 一次函数的图象和性质(8类热点题型讲练)-【帮课堂】2023-2024学年八年级数学上册同步学与练(北师大版)浙江省宁波市七校2023-2024学年八年级上学期12月期末培优联测数学试题江苏省连云港市2023-2024学年八年级上学期期末数学试题
更新时间:2023-04-09 13:55:09
|
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解答题-计算题
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适中
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【推荐2】已知,a、b、c在数轴上的位置如图.
(2)化简:|a+1|-|c-b|-|b-1|+|c-2a|;
(3)若a+b+c=0,且b与-1的距离和c与-1的距离相等,求2(b+2c)-a(a-1)-(c-b)的值.
(2)化简:|a+1|-|c-b|-|b-1|+|c-2a|;
(3)若a+b+c=0,且b与-1的距离和c与-1的距离相等,求2(b+2c)-a(a-1)-(c-b)的值.
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【推荐1】在平面直角坐标系中,点
到x轴的距离为4,且点P在直线
上,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f798f6d7eac2f6235f64c05a15e82fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b74381f68eb1e33d412a7a3d62313f.png)
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【推荐2】如图1,已知直线
交y轴、x轴于点
,点
.直线
:
交直线
于点P.点G为x轴上一点,过点G作x轴的垂线交直线
,
于E,F两点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/deab00d3-0662-4150-b38a-58ccf5c509fc.png?resizew=490)
(1)求直线
的函数表达式.
(2)如图1,若点P到y轴距离与到直线
的距离相等,求点G的坐标.
(3)在(2)的条件下,如图2,点M为y正半轴上一个动点,设点M的坐标
,连结
,将线段
绕点M顺时针旋转
得线段
,连接
,若点M在运动过程中
始终在
的内部(包括边界),求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee33736169c249a029f478a605dc2c05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f36488f7dff759ace2a27e56c3857056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b5034347ee34d1dd396b5f4b7df8aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/4/deab00d3-0662-4150-b38a-58ccf5c509fc.png?resizew=490)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
(2)如图1,若点P到y轴距离与到直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
(3)在(2)的条件下,如图2,点M为y正半轴上一个动点,设点M的坐标
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e4ea387d312c373970434e84779364.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6446c4da49caa9ff78282448bfde2e1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6446c4da49caa9ff78282448bfde2e1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a0387fc1258f31e44a10068c0ccfd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fe748ca5f19ce6e5ce601d1f889fd92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cafbe2751f4f4c5a8e676818195e9111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf8802dc9594270a15dbe28ac897c218.png)
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【推荐3】如图,在平面直角坐标系中,点A在第一象限且横坐标是3,点B在第三象限且横坐标是
,点
在y轴上.连接
,线段
,且经过原点.过点A作
轴于点D,过点B作
轴于点E.
_______,
_______,三角形
的面积是_______;
(2)如图2,将线段
平移至
,且仍经过原点,点A的对应点
的横坐标是
.过点C作
于点F,求
的长度;
(3)如图3,将线段
向下平移至
,点A的对应点
为
,点B的对应点
的纵坐标是
,线段
与y轴交于点G.点
是y轴上一动点,当三角形
的面积小于3时,求点G的坐标,并直接写出t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d6e498b0c1d1cedb86fe548f9fe79a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602f64f0c8a0fa105d583d698d0af3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801ecad679f2c7d16dae25c95317ce29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1bc69e886c7afedf1c9233e9a2a6870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95a9f6c1893aca98a345a0a63ee053a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)如图2,将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18136487df6fe03e09f7d99a5f6e27b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9739232920c6297634e767943b1bae7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
(3)如图3,将线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34876d748f30fa4fc2eb6a686b5ff5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623afc24f2227004b0e1b3922dfb954b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a736ec51eb7f4da4894ba40559c6b698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00a4b9916fe84f091cd4a02964532d70.png)
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【推荐1】已知直线L于直线 y=-
x+3平行,且过点(4,3),求直线L与两坐标轴围成的三角形面积.
![](https://img.xkw.com/dksih/QBM/2016/12/30/1633718589063168/1633718589325312/STEM/504d228eba8f4c7b95127cba8830265f.png)
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【推荐2】如图,直线l的解析式为y=﹣x+4,它与x轴、y轴分别相交于A、B两点.平行于直线l的直线m从原点O出发,沿x轴的正方向以每秒1个单位长度的速度运动,它与x轴、y轴分别相交于M、N两点,设运动时间为t秒(0<t≤4).
(1)求A、B两点的坐标;
(2)以MN为对角线作矩形OMPN,记△MPN和△OAB重合部分的面积为S1,在直线m的运动过程中,当t为何值时,S1为△OAB面积的
?
(1)求A、B两点的坐标;
(2)以MN为对角线作矩形OMPN,记△MPN和△OAB重合部分的面积为S1,在直线m的运动过程中,当t为何值时,S1为△OAB面积的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a954eb4370c2aa523f327bf1e6a5e2f7.png)
![](https://img.xkw.com/dksih/QBM/2019/5/19/2207190120882176/2213525563236352/STEM/dbec1e5f211742dc89bdeb2656cdfd17.png?resizew=395)
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