The problem asks us to determine the four inequalities that define the unshaded region $R$ on the $XOY$ plane shown in the image.
2025/3/27
1. Problem Description
The problem asks us to determine the four inequalities that define the unshaded region on the plane shown in the image.
2. Solution Steps
From the image, we can identify four lines that bound the unshaded region.
First, there is a vertical line at . The unshaded region is to the right of this line, so .
Second, there is another vertical line at . The unshaded region is to the left of this line, so . Thus we have or and .
Third, there is a horizontal line at . The unshaded region is below this line, so .
Fourth, there is a diagonal line that appears to pass through and .
Let's find the equation of the line. The slope is given by:
Using the point-slope form with point :
The unshaded region is above this line, so .
Combining the inequalities, we have:
3. Final Answer
The four inequalities are: