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函数是高中数学的主线,每年高考对函数问题的考察总占有相当大的比例。尤其是导数进入了数学教材之后,给问题的研究注入了生机与活力,为我们解决学过的有关函数问题提供了一般性的方法,开辟了与其它数学知识结合的新途径和新题型。而二次函数是高中数学的传统经典内容,一元二次方程、一元二次不等式均为其有机整体,统称“三个二”问题,涉及内容广
Function is the main line of high school mathematics, college entrance examination on the issue of the function of each occupy a considerable proportion. In particular, after the derivative has entered the mathematics teaching materials, it injects vigor and vitality into the study of the problem, provides a general method for us to solve the problem of the function that has been learned, and opens up new ways and new kinds of questions combined with other mathematical knowledge. The quadratic function is the classical classic of high school mathematics. The quadratic equation and the quadratic inequality are all the organic whole, which are collectively referred to as “three two” problems, involving a wide range of topics