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1、反比例函数一、基础知识1.定义：一般地，形如xky（k 为常数，ok）的函数称为反比例函数。xky还可以写成kxy12.反比例函数解析式的特征：等号左边是函数 y，等号右边是一个分式。分子是不为零的常数k（也叫做比例系数 k），分母中含有自变量x，且指数为 1.比例系数0k自变量x的取值为一切非零实数。函数 y 的取值是一切非零实数。3.反比例函数的图像图像的画法：描点法 列表（应以 O为中心，沿 O的两边分别取三对或以上互为相反的数）描点（有小到大的顺序）连线（从左到右光滑的曲线）反比例函数的图像是双曲线，xky（k 为常数，0k）中自变量0 x，函数值0y，所以双曲线是不经过原点，断开的两
2、个分支，延伸部分逐渐靠近坐标轴，但是永远不与坐标轴相交。反比例函数的图像是是轴对称图形（对称轴是xy或xy）。反比例函数xky（0k）中比例系数k 的几何意义是：过双曲线xky（0k）上任意引x轴 y 轴的垂线，所得矩形面积为k。4反比例函数性质如下表：k 的取值图像所在象限函数的增减性ok一、三象限在每个象限内，y 值随x的增大而减小ok二、四象限在每个象限内，y 值随x的增大而增大5.反比例函数解析式的确定：利用待定系数法（只需一对对应值或图像上一个点的坐标即可求出 k）6“反比例关系”与“反比例函数”：成反比例的关系式不一定是反比例函数,但是反比例函数xky中的两个变量必成反比例关系。7
3、.反比例函数的应用二、例题【例 1】如果函数222kkkxy的图像是双曲线，且在第二，四象限内，那么的值是多少？【解析】有函数图像为双曲线则此函数为反比例函数xky，（0k）即kxy1（0k）又在第二，四象限内，则0k可以求出的值【答案】由反比例函数的定义，得：01222kkk解得0211kkk或1k1k时函数222kkkxy为xy1【例 2】在反比例函数xy1的图像上有三点1x，1y，2x，2y，3x，3y。若3210 xxx则下列各式正确的是（）A213yyy B 123yyy C 321yyy D 231yyy【解析】可直接以数的角度比较大小，也可用图像法，还可取特殊值法。解法一：由题意
4、得111xy，221xy，331xy3210 xxx，213yyy所以选 A 解法二：用图像法，在直角坐标系中作出xy1的图像描出三个点，满足3210 xxx观察图像直接得到213yyy选 A 解法三：用特殊值法213321321321,1,1,211,1,2,0yyyyyyxxxxxx令【例 3】如果一次函数的图像与反比例函数xmnymnmxy30相交于点（221，），那么该直线与双曲线的另一个交点为（）【解析】12132212213nmmnnmxxmnynmxy解得，相交于与双曲线直线文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1
5、E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H
6、10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D
7、1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7
8、T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q
9、8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E
10、6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2
11、Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7221111121,122211yxyxxyxyxyxy得解方程组双曲线为直线为11，另一个点为【例 4】如图，在AOBRt中，点 A是直线mxy与双曲线xmy在第一象限的交点，且2AOBS，则m的值是 _.图解:因为直线mxy与双曲线xmy过点 A,设 A点的坐标为AAyx,.则有AAAAxmymxy,.所以AAyxm.又点A在第一象限,所以AAAAyyABxxOB
12、,.所以myxABOBSAAAOB212121.而已知2AOBS.所以4m.三、练习题1.反比例函数xy2的图像位于（）A第一、二象限 B 第一、三象限 C 第二、三象限 D 第二、四象限2.若 y 与x成反比例，x与z成正比例，则 y 是z的（）A、正比例函数 B、反比例函数 C、一次函数D、不能确定3.如果矩形的面积为6cm2，那么它的长ycm 与宽xcm 之间的函数图象大致为（）文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8
13、H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6
14、D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z
15、7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3
16、Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3
17、E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR
18、2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4
19、G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7o y x y x o y x o y x o A B C D4.某气球内充满了一定质量的气体，当温度不变时，气球内气体的气压P(kPa)是气体体积 V(m3)的反比例函数，其图象如图所示当气球内气压大于 120 kPa时，气球将爆炸为了安全起见，气球的体积应（）A、不小于54m3 B、小于54m3 C、不小于45m3 D、小于45m3 5如图，A、C是函数xy1的图象上的任意两点，过A作x轴的垂线，垂足为B，过 C作 y 轴的垂线，垂足为D，记 RtAOB 的面积为 S
20、1，RtCOD 的面积为 S2则（）A S1S2 B S1 S2C S1=S2 D S1与 S2的大小关系不能确定6 关于 x 的一次函数 y=-2x+m和反比例函数 y=1nx的图象都经过点 A（-2，1）.求：（1）一次函数和反比例函数的解析式；（2）两函数图象的另一个交点B的坐标；（3）AOB的面积7.如图所示，一次函数yaxb 的图象与反比例函数ykx的图象交于 A、B两点，与 x 轴交于点 C已知点 A的坐标为（2，1），点 B的坐标为（12，m）（1）求反比例函数和一次函数的解析式；（2）根据图象写出使一次函数的值小于反比例函数的值的x 的取值范围OCABOyxABCD文档编码:C
21、R2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT
22、4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI
23、4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码
24、:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6
25、HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5
26、ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档
27、编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O78 某蓄水池的排水管每小时排水8m3，6 小时可将满池水全部排空（1）蓄水池的容积是多少？（2）如果增加排水管，使每小时的排水量达到Q（m3），那么将满池水排空所需的时间 t（h）将如何变化？（3）写出 t 与 Q的关系式（4）如果准备在 5 小时内将满池水排空，那么每小时的
28、排水量至少为多少？（5）已知排水管的最大排水量为每小时12m3，那么最少需多长时间可将满池水全部排空？.9.某商场出售一批名牌衬衣，衬衣进价为 60元，在营销中发现，该衬衣的日销售量 y（件）是日销售价x 元的反比例函数，且当售价定为100 元/件时，每日可售出 30 件.（1）请写出 y 关于 x 的函数关系式；（2）该商场计划经营此种衬衣的日销售利润为1800元，则其售价应为多少元？10如图，在直角坐标系 xOy中，一次函数 ykxb 的图象与反比例函数myx的图象交于 A(-2，1)、B(1，n)两点。(1)求上述反比例函数和一次函数的表达式；(2)求AOB 的面积。文档编码:CR2Z7
29、T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q
30、8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E
31、6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2
32、Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G
33、3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D
34、3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:C
35、R2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7四、课后作业1对与反比例函数xy2，下列说法不正确的是（）A点（1,2）在它的图像上B它的图像在第一、三象限C当0 x时，的增大而增大随xyD当0 x时，的增大而减小随xy2.已知反比例函数0kykx的图象经过点（1，-2），则这个函数的图象一定经过（）A、（2，1）B、（2，-1）
36、C、（2，4）D、（-1，-2）3在同一直角坐标平面内，如果直线xky1与双曲线xky2没有交点，那么1k和2k的关系一定是（）A.1k+2k=0 B.1k2k0 D.1k=2k4.反比例函数 ykx的图象过点 P（1.5，2），则 k_5.点 P（2m 3，1）在反比例函数y1x的图象上，则 m _ 6.已知反比例函数的图象经过点（m，2）和（2，3）则 m的值为_7.已知反比例函数xmy21的图象上两点2211,yxByxA，当210 xx时，有21yy，则m的取值范围是？8.已知 y 与 x-1 成反比例，并且 x-2 时 y7，求：(1)求 y 和 x 之间的函数关系式；(2)当 x=
37、8 时，求 y 的值；(3)y-2 时，x 的值。9.已知3b,且反比例函数xby1的图象在每个象限内，y 随x的增大而增大,如果点3,a在双曲线上xby1，求 a 是多少？文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2
38、Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G
39、3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D
40、3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:C
41、R2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT
42、4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7文档编码:CR2Z7T1E7O6 HT4G3Q8H10X5 ZI4D3E6D1O7