有解问题是中学数学教学中的重要内容,也是高中函数中的难点知识.它是函数、不等式、数列等内容交汇点,近几年在各省的高考试题中经常出现.这类问题它不仅仅考查函数、不等式等有关知识、方法,而且考查导数等工具的掌握和运用.有解问题常与恒成立问题相混淆,为了更好地掌握函数有解问题的解法,现将函数有解问题的解法探求如下:一、方程有解问题例1设f(x)=3ax+1-2a在(-1,1)上存在x0,使 Solving problems is an important part of middle school mathematics teaching, and it is also difficult knowledge in high school functions. It is a meeting point for functions, inequalities, and series. It has frequently appeared in the examination questions in various provinces in recent years. Such problems are not only Examination of functions, inequalities, and other related knowledge and methods, as well as examination of derivatives and other tools for their use and understanding. Solving problems is often confused with the establishment of the problem, in order to better grasp the solution of the function has a solution problem, now the function has a solution to the problem Solve the solution as follows: First, the equation has a solution Problem Example 1 Let f(x)=3ax+1-2a exist on (-1,1), so that