“变题”思想的常用方法福建三明一中林元密变题．即变更问题．本文变题指的基本思想是，只变更问题的表达形式．而不改变问题的实质．数学问题的表达形式有文字表达形式、符号表达形式和图象表达形式三种、一般说来．文字表达形式具有语义清楚的特点，符号表达形式具有简... The commonly used method of “changing the subject” thoughts. That is to change the problem. The basic idea of ​​changing the subject of this article is to change only the expression of the problem. Without changing the substance of the problem. Mathematical problems can be expressed in three forms: written expressions, symbolic expressions, and image expressions. The written expression has the characteristics of clear semantics, and the symbolic expression form has simple...