回顾近几年来高考数学命题的情况,引人注目的是试题中的对数问题.下面介绍解这类问题的若干方法,供参考。一、普通法这种方法是运用对数函数的概念、性质解对数问题.其次对方程或不等式进行变形,并注意两点:第一,步步变形是否有意义;第二,变形后得到的新方程(新不等式)是否与原方程(原不等式)同解,最后,验根手续也是不可缺少的。 Recalling the situation of the mathematics propositions of the college entrance examination in recent years, what attracts attention is the logarithmic problem in the questions. The following describes some methods for solving such problems for reference. First, the common law This method is to use the concept of logarithmic functions, the nature of the problem of solving logarithms. Second, the equation or inequality deformation, and pay attention to two points: First, step-by-step deformation is significant; Second, after the deformation Whether the new equation (new inequality) is the same as the original equation (former inequality) and, finally, the rooting procedure is also indispensable.