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在(中学教研》(1988一3一4)上刊文给出了定点P关于直线:Ax+By+C二0对称点P’的坐标计算公式.笔者在本文将给出定点P关于直线l:■
In the (secondary teaching and research) (1988-3-4) the article gives the coordinates of the fixed point P on the straight line: Ax+By+C20 symmetry point P’. The author will give the fixed point P on the straight line l :■