我们知道,一般情形下,含一个变量x的方程f(x)=0的根只有有限个,而含两个变量x、y的方程f(x,y)=0,其解可能是无限个(不确定),含两个或两个以上变量的方程叫做不定方程.近年来,以“数列”为背景的不定方程问题在各类考试中时有出现,此类问题的难点不在数列,而在如何求解不定方程,而“不定方程”一般在竞赛中出现较多,在中学教材中很少涉及,因此学生解决此类问题往往束手无策,下面结合具体例子 We know that under normal circumstances, there is only a finite number of roots of the equation f (x) = 0 with one variable x and the equation f (x, y) = 0 with two variables x and y may be infinite (Uncertain), an equation with two or more variables is called an indefinite equation. In recent years, the indefinite equation with the background of “number of columns ” has appeared in all kinds of exams. The difficulty of such problems is not in the sequence , And how to solve the indefinite equation, and “indefinite equation ” generally appear more in the competition, rarely involved in the textbook of middle school, so students are often helpless to solve such problems, the following combination of specific examples