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在曲线、曲面方程f(x,y)=0、f(x,y,z)=0中,如果f的某些含有变量的部分上,带有绝对值符号,就称f=0为含有绝对值的曲线或曲面方程,简称绝对值方程.1构图的意义已知绝对值方程,描绘图形,有着重要意义.有些方程,如y=|x|-1(1)我们不知它的图形是什么,如描出图形,眼见为实,也就知道了
In the curve and surface equations f(x,y)=0 and f(x,y,z)=0, if some of f’s part containing variables has an absolute sign, f=0 is said to contain Absolute value of the curve or surface equations, abbreviated as absolute value equation.1 The significance of composition The known absolute value equation, depicting the graph, is of great significance. Some equations, such as y=|x|-1 (1) we do not know its graph is What, such as drawing a picture, seeing it as it is, also knows