函数的性质,主要指函数的单调性、奇偶性和周期性.它们的应用往往是一个问题中综合了几个性质,甚至渗透或涉及到其它的知识体系.这样,函数的性质就自然又成为了高考的难点.因此,利用函数的性质解决具体问题时,要注重研究其内在联系,揭示其规律,掌握其最有效的解题方法.一、函数 The nature of functions mainly refers to the monotonicity, parity, and periodicity of functions. Their application is often a combination of several properties in a problem, and even infiltrate or involve other knowledge systems. In this way, the nature of the function naturally becomes The difficulty of the college entrance examination. Therefore, when using the nature of the function to solve specific problems, we must pay attention to its internal relations, reveal its laws, and master its most effective method of solving problems. First, the function