1 . 已知点
在一次函数
(b为常数)的图象上.
(1)求b的值;
(2)若点
在这个一次函数的图象上,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aab000962b3e21db0bd949eb7a0d6fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9bd144e0e96e4236a14523e0729cacb.png)
(1)求b的值;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe03d3310d174a31be83769a36860e4.png)
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2 . 如图,反比例函数
与一次函数
的图象交于点
,
轴于点D,分别交反比例函数与一次函数的图象于点B,C.
与一次函数
的表达式;
(2)当
时,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707f0fb81c5dcbf009aa64b38d20e1f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/463742c5f9c442d712f183d7430f4134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/038dff25f3ff40b0a9ac61811e5a7b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05de5eef286a1b48012246c0cf88a1c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/463742c5f9c442d712f183d7430f4134.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70834818750d0454474ac7c357cd287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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3 . 已知y与成正比例,且
时,
.
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
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2024-04-02更新
|
204次组卷
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3卷引用:江西省南昌市2023-2024学年八年级下学期期中数学试题
江西省南昌市2023-2024学年八年级下学期期中数学试题湖南省长沙市长郡开福中学2023-2024学年八年级下学期月考数学试题(已下线)第19章 一次函数达标测试卷-2023-2024学年八年级数学下册《知识解读·题型专练》(人教版)
名校
4 . 已知与x成正比例,当
时,
.
(1)求y与x的函数表达式;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c98a7f3a8bf384b1dfc1d34aebd46d2.png)
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5 . 已知一次函数
的图象与二次函数
的图象相交于点
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/48ee1bdc-af6f-41c7-9d2e-ac0504f6890d.png?resizew=229)
(1)求二次函数的表达式;
(2)结合图象,直接写出当
时x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab466aedd6e176088d8dee7bc3e3aaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8794fdd5b979fa369ac350d063f631d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d57173ef4cd72eb270686875dfd623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643ee245c16f65705b1a38b3c177906e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/48ee1bdc-af6f-41c7-9d2e-ac0504f6890d.png?resizew=229)
(1)求二次函数的表达式;
(2)结合图象,直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/971b382cea3b8ab60400bbfa85afabd9.png)
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6 . 已知一次函数
的图象上一点A到
轴的距离为1,则
长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
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7 . 在初中阶段的函数学习中,我们经历了列表,描点,连线画函数图象,并结合图象研究函数性质的过程.若一个函数当自变量在不同范围内取值时,函数表达式不同,我们称这样的函数为分段函数.下面我们参照函数学习的过程与方法,探究分段函数
的图象与性质,探究过程如下,请补充完整,
(1)列表:
其中,
_________,
_________.
(2)描点:在平面直角坐标系中,以自变量x的取值为横坐标,以相应的函数值y为纵坐标,描出相应的点,如图所示,请画出函数的图象.
①点
,
,
,
在函数图象上,则
______
,
______
;(填“>”,“=”或“<”);
②在直线
的右侧的函数图象上有两个不同的点
,
且
,则
的值为_________;(注:直线
为经过
且垂直x轴的直线)
③直线
与图象相交,交点依次从左到右为M,N,K三点,如果
,求t的值.
(注:直线
为经过
且垂直y轴的直线)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/154a2b56f5411779f5affcba8ffac8f3.png)
(1)列表:
x | … | 0 | 1 | 2 | 3 | … | ||||||
y | … | m | 0 | 1 | n | 1 | 2 | 3 | 4 | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d15fd2bf17bf2fc3d30979d03ffbc04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
(2)描点:在平面直角坐标系中,以自变量x的取值为横坐标,以相应的函数值y为纵坐标,描出相应的点,如图所示,请画出函数的图象.
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe04f2e2b00cb682d2a73d204828db2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df7579c2817a45d9f245c88bd7d8f157.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ebb4a7f69a3a5ef8cb459a7d6717dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9dd856164b08ea518171d595cfb132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
②在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8315b3a050f7d798451ff0f28481fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf3938c43de5f93d2983553d979f32a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc027d4355dc20e17cc2da1e5e76d9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8637836592d705a0e9650c1f99c5f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc8350b12974ffc8d06fce36d158f02.png)
③直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ff39dd1dfc9caf911ad0d11ba21d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87744cca2f2acefd4300abbd469acef4.png)
(注:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ff39dd1dfc9caf911ad0d11ba21d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b96dbf02194b5466bc11cb63c874c97.png)
您最近一年使用:0次
8 . 已知函数
是一次函数,
(1)求
的值;
(2)该一次函数当
时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e84823e596fac5c4aeccd56c712d20.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)该一次函数当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4668f77ac3f5664d228a5d86ce2adfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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9 . 如图,直线
经过点
、
和点
,且点
的横坐标为
,点
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/e6e5da03-e7ca-4077-8c74-2ffe6ae39a57.png?resizew=149)
(1)求直线
的解析式;
(2)若点
为线段
上的一个动点,当
的值最小时,求出点
坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0d1e4a02f6a99a4b838dcaf9541d7f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6938eeb65411eeac15e140cf1db99773.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/fb8f58755aee89fb2cf72ba518dcee2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/e6e5da03-e7ca-4077-8c74-2ffe6ae39a57.png?resizew=149)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186dee1a1cf68677d143172a2a50709c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
名校
10 . 已知
与
成正比例,且当
时,
.
(1)求出y与x之间的函数解析式;
(2)判断点
是否在这个函数的图象上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26a7fa0f27339e750dd7e7c3b8b37759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/792be5953f7752ccf49405231fa1ebc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9355031ea0b2dc9cef3777621bc6d38.png)
(1)求出y与x之间的函数解析式;
(2)判断点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f5c484e833ebde134679f624ff23b1f.png)
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2023-12-27更新
|
56次组卷
|
2卷引用:江西省宜春市丰城市江西省丰城中学2023-2024学年八年级下学期开学考试数学试题