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高中数学中的有关“恒成立”、“能成立”、“恰成立”等问题,虽然在教材中没有专门的讲解,但是这些内容一直以来都是高中数学教学的重点和难点.又因为这类问题的解法较多,同时在一些题目中更是没有明显出现“恒成立”、“能成立”、“恰成立”、“都成立”等字样,若明若暗,具有一定的隐藏性,极易被解题者忽视.所以在历年高考(江苏近年来几乎年年都考)中都屡见不鲜.如何准确地、快速地解决这类问题?笔者认为分离变量法
Although there are no specific explanations in textbooks, these contents have always been the focus of high school mathematics teaching But also because of the solution of such problems are more, but in some of the topics is not even more obvious “constant establishment ”, “can be established ”, “just established ”, “are established ” and so on Words, if the bright dark, has a certain degree of hidden, easily overlooked by the solver .So in the calendar year college entrance examination (Jiangsu almost every year test) are not uncommon how to accurately and quickly solve these problems? I think the separation Variable method