论文部分内容阅读
高中数学中,对称问题,是解析几何中比较典型,高考中常常考到的热点问题.对于直线中的对称问题,我们可以分为这样几类:点关于点的对称,点关于直线的对称,直线关于点的对称,直线关于直线的对称。其中,点关于直线对称点问题是基础,大多数学生虽然知道常规性解法,但实际操作中却屡屡出现错误。如图,设P(a,b)关于直线l:Ax+By+C=0的对称点Q(x,y),则有(特
High school mathematics, symmetry, is more typical of analytic geometry, college entrance examination often test hot issues.For the symmetry in the straight line, we can be divided into these categories: Point on the point of symmetry, point on the line of symmetry, Symmetry of a straight line with respect to a point, Symmetry of a straight line with respect to a straight line. Among them, the point on the line of symmetry is the basis for the problem, although most students know the conventional solution, but the actual operation has repeatedly mistakes. As shown in the figure, let P (a, b) be the symmetry point Q (x, y) of the straight line l: Ax + By + C = 0,