设点A关于直线的对称点为A'(x,y)由(-1)*[(y-3)/(x-2)]=-1(x+2)/2+(y+3)/2+5=0两个方程解得A′坐标为(-8,-7)反射光线即直线A′B方程可求为13x-7y+55=0题中直线与A′B交点可求,为(-9/2,-1/2)入射光线可求为7x-13y+25=0