《2022年2019年中考总结复习冲刺专题 .pdf》由会员分享，可在线阅读，更多相关《2022年2019年中考总结复习冲刺专题 .pdf（4页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、数学试卷2019 中考总结复习冲刺练：一次函数解析式的常见题型一.定义型例 1.已知函数是一次函数，求其解析式。解：由一次函数定义知，故一次函数的解析式为注意：利用定义求一次函数解析式时，要保证。如本例中应保证二.点斜型例 2.已知一次函数的图像过点（2，1），求这个函数的解析式。解：一次函数的图像过点（2，1），即故这个一次函数的解析式为变式问法：已知一次函数，当时，y 1，求这个函数的解析式。三.两点型已知某个一次函数的图像与x 轴、y 轴的交点坐标分别是（2，0）、（0，4），则这个函数的解析式为_。解：设一次函数解析式为由题意得数学试卷故这 个一次函数的解析式为四.图像型例 4.已知某
2、个一次函数的图像如图所示，则该函数的解析式为_。解：设一次函数解析式为由图可知一次函数的图像过点（1，0）、（0，2）有故这个一次函数的解析式为五.斜截型例 5.已知直线与直线平行，且在y 轴上的截距为2，则直线的解析式为_。解析：两条直线：；：。当，时，直线与直线平行，。又直线在 y 轴上的截距为2，故直线的解析式为六.平移型文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y
3、2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P
4、9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y
5、2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P
6、9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y
7、2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P
8、9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6数学试卷例 6.把直线向下平移
9、 2 个单位得到的图像解析式为 _。解析：设函数解析式为，直线向下平移2 个单位得到的直线与直线平行直线在 y 轴上的截距为，故图像解析式为七.实际应用型例 7.某油箱中存油20 升，油从管道中匀速流出，流速为0.2 升/分钟，则油箱中剩油量Q（升）与流出时间t（分钟）的函数关系式为_。解：由题意得，即故所求函数的解析式为（）注意：求实际应用型问题的函数关系式要写出自变量的取值范围。八.面积型例 8.已知直线与两坐标轴所围成的三角形面积等于4，则直线解析式为_。解：易求得直线与x 轴交点为（，0），所以，所以，即故直线解析式为或九.对称型若直 线与直线关于（1）x 轴对称，则直线l的解析式为（
10、2）y 轴对称，则直线l的解析式为（3）直线 yx 对称，则直线l的解析式为（4）直线对称，则直线l的解析式为文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:
11、CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J
12、6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:
13、CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J
14、6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:
15、CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J
16、6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6数学试卷（5）原点对称，则直线l的解析式为例 9.若直线l与直线关于 y 轴对称，则直线l的解析式为 _。解：由（2）得直线l的解析式为十.开放型例 10.已知函数的图像过点A（1，4），B（2，2）两点，请写出满足上述条件的两个不同的函数解析式，并
17、简要说明解答过程。解：（1）若经过A、B两点的函数图像是直线，由两点式易得（2）由于 A、B两点的横、纵坐标的积都等于4，所以经过A、B两点的函数图像还可以是双曲线，解析式为文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H
18、3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W
19、2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H
20、3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W
21、2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H
22、3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6文档编码:CG1G5V8H3Y2 HV9W9E8J6H7 ZK2W2P9H8S6