我们知道,解分式方程的时候需要验根,因为解分式方程时会产生增根.为什么解分式方程的时候会产生增根呢?我们不妨从分式方程的解法、步骤分析以及理论依据中查找一下原因.例1解方程:x/(x-1)-1=3/((x-1)(x+2))要明白为什么会产生增根。先要明白什么是增根.增根是把分式方程化为整式方程后,那个整式方程的根,但它使得最简公分母为0.我们再看第一步.在第一步去分母时,若方程两边同时乘以一个值为0 We know that the solution of subdivision equations need to test the root, because the resolving equation will produce a root. Why do the solution when the equation will produce roots? We may wish to solve the fractional equation, step analysis and theory Find out the reason for this example: Example 1 Solve the equation: x / (x-1) -1 = 3 / ((x-1) (x + 2)) To see why there is a growing root. First to understand what is the root of the increase root is the partial equation into an integral equation, the root of the integral equation, but it makes the most common denominator of 0. Let us look at the first step in the first step to the denominator If both sides of the equation are multiplied by a value of 0 at the same time