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同学们都知道,反比例函数的图象是双曲线,它有一个很重要的性质——中心对称性,坐标原点是它的对称中心.如果同时分别用-x,-y替代
As the classmates all know, the image of the inverse proportional function is hyperbolic. It has a very important property—central symmetry. The origin of the coordinate is its symmetry center. If you use -x, -y instead