有些问题按常规思路去分析,可能难以获解.但若打破常规,用独特的思维视角去创造性地思考,则可能化难为易.用主元法解方程(组)就是一种具有创新思维的方法.例1已知二次方程ax2+(2a-1)x+a-3=0中a为正整数.当a取何值时,此方程至少有一个整数根?分析该题直接求x较难.我们反客为主,? Some problems may be difficult to be solved by analyzing their routines. However, if you break the convention and think creatively with a unique thinking perspective, you may find it difficult to solve problems. Using the principal component method to solve equations (groups) is an innovative way of thinking. Methods. Example 1 Known quadratic equation ax2+(2a-1)x+a-3=0 where a is a positive integer. When a takes any value, this equation has at least one integer root? Analysis of the problem directly seek x Difficult. We are anti-offspring?