湖北省武汉市八年级数学下册19.2一次函数19.2.3一次函数与一元一次方程、不等式限时练(无答案)(新版)新人教版.doc

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湖北省武汉市八年级数学下册19.2一次函数19.2.3一次函数与一元一次方程、不等式限时练(无答案)(新版)新人教版.doc_第1页
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1一次函数与一元一次方程( 40 分钟)班级: 姓名: 小组: 分数: 卷面: A 卷 基础题(每空 3 分,共 24 分)1、若直线 y=ax+b 的图像经过点(2,3),则方程 ax+b=3 的解是 。2、如图,直接写出 的解 1x3、已知方程 3x-6=0 的解为 , 则函数 y=3x-6 图像与 x 轴的交点的横坐标为 4、 是方程:y=mx+n 的解,则关于 x 的方程 mx+n=-1 的解为_。1yx5、已知一次函数 ,当 时, 的取值范围是( )2x0yA B C D 2x2x6、已知 交 轴与点(-4,0),则关于 的不等式 的解集是( )by 0bxA B C D 0.0x4x47、已知不等式 的解集是 ,则直线 必经过 点( ))(k2kyA B C D ),2(,2,),0(B 卷 拓展题(15 分)8、作出函数 的图像,利用图像回答3xy(1)当 等 于 多 少 ?时 ,(2)当 等 于 多 少 ?时 , xy1(3)方程 的 解 是 多 少 ?03(4)图像与两坐标轴围城的三角形的面积是多少?2C 卷 挑战题(11 分)9、利用图像法解下列不等式 42x

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