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1、3.3.1 二元一次不等式(组)与平面区域（第一课时）【学习目标】1 能从实际情境中抽象出二次一元不等式组;2 了解二次一元不等式的几何意义，能用平面区域表示二元一次不等式组【重点】用二元一次不等式（组）表示平面区域一、课前预习1：一元二次不等式的定义 _ 二元一次不等式定义 _ 二元一次不等式组的定义_ 二元一次不等式（组）的解是什么呢？探究 1:一元一次不等式（组）的解集可以表示为数轴上的区间，例如，3040 xx的解集为.那么，在直角坐标系内，二元一次不等式（组）的解集表示什么图形呢？探究 2:你能研究：二元一次不等式4yx的解集所表示的图形吗？因此，在平面直角坐标系中，不等式4yx表示
2、直线4yx_的平面区域；二元一次不等式4yx表示直线4yx_的区域；直线叫做这两个区域的 _。二元一次不等式0AxByc在平面直角坐标系中表示直线0AxByc某一侧所有点组成的平面区域.（虚线表示区域不包括边界直线）二、课堂练习例 1 画出不等式44 yx表示的平面区域。归纳：画二元一次不等式表示的平面区域常采用“直线定界，特殊点定域”的方法.特殊地，当0C时，常把原点作为此特殊点.例 2 用平面区域表示不等式组243yxx的解集归纳：不等式组表示的平面区域是各个不等式所表示的平面点集的交集，因而是各个不等式所表示的平面区域的公共部分.三、反刍归纳：如何画出二元一次不等式0CByAx表示的平面
3、区域？（总结出步骤）四、课堂检测：1 不等式260 xy表示的区域在直线260 xy的()A 右上方B 左上方C 右下方D 左下方2 不在326xy表示的平面区域内的点是（）A（0，0）B（1，1）C（0，2）D（2，0）3 已知原点和（1，1）在直线0 xya的同侧，则 a 的取值范围是 _ 4 画出不等式240 xy表示的平面区域.5 画出不等式组02062yxyx表示的平面区域。五、课后作业：课本 86 页 1.2.3 课本 93 页 A 组 1 3.3.1 二元一次不等式(组)与平面区域（第二课时）文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文
4、档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9
5、文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L
6、9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4
7、L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A
8、4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3
9、A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D
10、3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9【学习目标】1 能从实际情境中抽象出二次一元不等式组;2 了解二次一元不等式的几何意义，能用平面区域表示二元一次不等式组【重点】把实际问题抽象化，用二元一次不等
11、式（组）表示平面区域.一、课堂练习1.画出不等式组00222yyxyx所示平面区域2.要将两种大小不同的钢板截成A、B、C 三种规格，每张钢板可同时截得三种规格的小钢板的块数如下表所示：规格类型钢板类型A 规格B 规格C 规格第一种钢板1 2 1 第二种钢板2 1 3 今需要三种规格的成品分别为12 块、15 块、27 块，用数学关系式和图形表示上述要求四、课堂检测：1.一个化肥厂生产甲乙两种混合肥料，生产 1 车皮甲肥料的主要原料是磷酸盐4t，硝酸盐 18t；生产 1 车皮乙种肥料的主要原料是磷酸盐1t，硝酸盐 15t.现库存磷文档编码:CY8A10V1K2N10 HE1C3O1S4P2 Z
12、T2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2
13、ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2
14、 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P
15、2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4
16、P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S
17、4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1
18、S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9酸盐 10t，硝酸盐 66t，在此基础上生产这两种混合肥料.列出满足生产条件的数学关系式，并画出相应的平面区域.2.某人准备投资1 20
19、0 万兴办一所完全中学，对教育市场进行调查后，他得到了下面的数据表格（以班级为单位）：学段班级学生人数配备教师数硬件建设(万元)教师年薪(万元)初中45 2 26/班2/人高中40 3 54/班2/人分别用数学关系式和图形表示上述限制条件.5.不 等 式 组438000 xyxy表 示 的 平 面 区 域 内 的 整 点 坐 标是.五、课后作业：课本 86 页 4 课本 93 页 A 组 2 B 组 1，2 文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8
20、A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY
21、8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:C
22、Y8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:
23、CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码
24、:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编
25、码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9文档编码:CY8A10V1K2N10 HE1C3O1S4P2 ZT2N10D3A4L9