函数性质是函数的重要知识,是解决函数问题的有力武器,在处理具体函数问题时,从研究、挖掘函数性质入手,常常可以起到化难为易、防止错误的作用.以下举例说明. The nature of the function is an important knowledge of the function and a powerful weapon for solving the function problem. When dealing with the problem of a specific function, starting from the study and mining the nature of the function, it can often play the role of turning difficult into difficult and preventing wrong.