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《数学通报》1 996年第 1期“借助图形求一次函数在某一点的取值范围”(以下简称文[1 ]) .通过物理学的联想、借助图形使问题得解 ,构思较为巧妙 .本文根据重要数学思想与常用数学方法得到此类问题又一种思路自然、过程简单的方法 .1 一次函数在某一点的取值范围为了便于对不?
“Mathematical Bulletin” 1 996 No. 1, “with the aid of graphics to obtain a range of values for a function at a certain point” (hereinafter referred to as [1]). Through the physics of association, the problem is solved by means of graphics, the concept is more ingenious. This article is based on important mathematical ideas and commonly used mathematical methods to get such a problem and a natural way, the process is simple. 1 The value of a function at a certain point in order to facilitate the right?