贵刊2010年1——期(初中)发表了王润中老师的《对一道中考压轴题“遗留”问题的探讨》的文章(下称“原文”),文中对北京市2009年中考数学试卷的最后一道压轴题的解法作了探讨,并给出了避免“大题小作”的解法,读后很受启发.“原文”给出了用根的判别式确定G点位置的方法,这种方法主要是通过代数运算来确定G点的位置(下称“以数定点”法),并指出“在淡化了一元二次方 Your journal 2010-1- (junior high school) published an article by Wang Runzhong on the question of ”left over from the question of a secondary school entrance examination“ (hereinafter referred to as the ”original“). In this paper, Mathematics papers the final finale of the problem-solving approach was discussed, and given to avoid ”solution “ solution, very inspired after reading. ”Original “ gives the root discriminant to determine the G point Position, this method is mainly through the algebra to determine the location of the G point (hereinafter referred to as ”fixed-point “), and pointed out that ”in the desalination of a quadratic