对称问题是高中数学的比较重要内容,它的一般解题步骤是: 1.在所求曲线上选一点M(x,y); 2.求出这点关于中心或轴的对称点M’(x0,y0)与M(x,y)之间的关系; 3.利用f(x0,y0)=0求出曲线g(x,y)=0. 直线关于直线的对称问题是对称问题中的较难的习题,但它的解法很多,现列举其中的几种,供大家参考. The symmetry problem is a more important content of high school mathematics. Its general problem-solving steps are: 1. Select a point M(x,y) on the desired curve; 2. Find this point about the symmetry point of the center or axis M’ ( The relationship between x0,y0) and M(x,y); 3. Find the curve g(x,y)=0 with f(x0,y0)=0. The symmetry problem of a straight line about a line is a symmetry problem. More difficult exercises, but its solution is many, now enumerate several of them for your reference.