题目

which quadrant contains no solutions for the the region defind by 2x+y>4?
A:I
B:II
C:III
D:IV
Lets think about a coordinate grid.
2.It has 4 quadrants.
3.The upper right region is called quadrant I
4.The upper left region is called quadrant II
5.The lower left region is called quadrant III
6.The lower right region is called quadrant IV
7.Now think about the coordinate points in each of the 4 regions.
8.Think,think.if you have this equation:2 x + Y > 4 and you have tell which region of the
coordinate grid WILL NOT give you the (X,Y) coordinate pairs to yield a true statement for
2 x + y > 4
9.Tips:try replacing x and y values using these examples below:
for quadrant I try (2,2)
for quadrant II try ( -1,8)
for quadrant III try (-1,-8)
for quadrant IV try ( 8,2)10.After replacing these coordinate pairs in the inequality of :2X + Y >4
WHAT IS YOUR ANSWER CHOICE NO

提问时间：2021-04-01

答案

2x+y>4 定义的区域在哪一个象限中无解?A：象限1B：象限2C：象限3D：象限4（这是一道数学题的解题思路.外国的教学方法和国内可能有些不同,你会觉得提出的方法很麻烦又不确定.按我们的习惯,因为 2x+y>4即 y> -2x+4,那...