我们经常会遇到线性对称变换问题:求曲线C:F(x,y)=0关于直线l:ax+by+c=0对称后所得曲线C′的方程.解这类问题,一般是设点P(x,y)是C′上的任意一点,关于直线l对称后的点为P′(x′,y′),则P′(x′,y′)必在曲线C上,然后根据直线l垂直平分线段PP′列出两个方程y′-yx′-x·(-ab)=- We often encounter linear symmetry transformation problems: find the curve C: F (x, y) = 0 about the straight line l: ax + by + c = 0 symmetry obtained curve C’ equation. Solution to this type of problem is generally set The point P(x,y) is any point on C’, and the point symmetrical about the straight line l is P’(x’,y’), then P’(x’,y’) must be on curve C, and then Vertically bisecting the line segment PP′ according to the straight line l lists two equations y′-yx′-x(-ab)=-