论文部分内容阅读
我们容易证明命题:方程|x-a|+|y-b|=m的图像,是以(a,b)为中心,对角线平行于坐标轴,且对角线长为2m的正方形。下面应用它解答一例。
We can easily prove the proposition: The image of the equation |x-a|+|y-b|=m is a square centered on (a,b) with the diagonal line parallel to the axis and a diagonal length of 2m. Apply it below to answer one example.