有些最值问题,乍看似乎无从下手,但仔细观察后,发现可以和不等式、有理式的除法联系起来,问题就能迎刃而解.贵刊(初中版)2012年6月(下)期刊登了姜印明老师的《用有理式的除法解题两例》一文,读后颇受启发,笔者对原文的例2做了进一步拓广:由“数位增大”拓广到“数位减少”;由“求最小值”拓广到“求最大值”;由“比值”拓广到“倒数比值”.以期引导同学们掌握提出问 Some of the most significant problems, at first glance, seem impossible to start with, but after careful observation, we find that problems can be solved by linking them with inequality and rational division. (Jun.) (Junior High School Edition) June 2012 The teacher’s “rational division of the problem with two cases,” a text, read quite inspired, the author of the original case 2 has been further expanded: from “digital” to “digital reduction” ; By “seeking the smallest value” to “seek the maximum value”; from “ratio” to “countdown ratio” to guide students to master the question asked