整式加减中的数学思想

• 作 者: 陈德前
• 出 处: 初中生
• 发表日期: 2003年31期
• 关键词: 中都 斗冲 群舒 娜珍 二止

整式加减中隐含着一些重要的数学思想.活用这些思想可以解决不少的竞赛问题.一、分类的思想方法单项式、多项式、整式概念中都涉及到分类思想,用这种思想去思考问题,可收到化难为易的效果。例1 如果abc<0,a+b+c=0,则x=|a|/(b+c)+|b|/(a+c)+|c|/(a+b)的值为

There are some important mathematical ideas implied in the addition and subtraction of integers. Using these ideas can solve many problems in competition. First, the classification of ideas and methods The concept of monomial, polynomial, and integral are all related to the classification of ideas, and use this kind of thinking to think about problems. , you can receive hard-to-get results. Example 1 If abc<0, a+b+c=0, then x=|a|/(b+c)+|b|/(a+c)+|c|/(a+b)