对数函数是中学的基本初等函数之一,由于它的特殊性,导致我们很多同学在解决此类问题时经常会发生这样或那样的错误.本文列举了一些同学们在学习中很容易出现的一些问题并加以剖析,希望大家今后不要再发生类似错误.例1已知函数y=loga(2-ax)在区间[0,1]上是x的减函数,则a的取值 The logarithmic function is one of the basic elementary functions of middle school. Due to its particularity, many of our classmates often encounter this kind of error in solving such problems. This article lists some students who are likely to appear in learning. Some problems are analyzed and I hope that everyone will not make similar mistakes in the future. Example 1 Known function y=loga(2-ax) is a decreasing function of x in the interval [0,1], then the value of a