cjilyy 发表于 2011-10-14 09:30 % C( t1 D# c* ]& S; v" t: @ 此函数为隐函数,分段函数还不好作,现介绍Mathematica隐函数作图: + {5 M4 ]9 u" T: iContourPlot[Abs[x] + Abs[x + y] == ...