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众所周知,解无理方程、分式方程、对数方程时,倘若对原方程施行了非同解变形,容易产生增解或失解,因此,必须进行检验,这种检验是作为解题的一个不可缺少的步骤提出的.本文所说的检验意义不只如此,它是作为培养一种良好的解题习惯而提出的,即解答任何一道习题,都要自觉地从各个方面,采取各种不同的方法进行检查验证,确保解题的正确性,防止或减少不必要的失误.
As we all know, when solving unreasonable equations, fractional equations, and logarithmic equations, if the original equation is subjected to non-identical solution deformation, it is prone to produce solutions or misunderstandings. Therefore, it must be tested. This kind of test is an inexact question. The missing steps were put forward. The significance of the test mentioned in this paper is not only that it is raised as a good problem-solving practice. To answer any problem, you must consciously adopt various methods from all aspects. Check and verify to ensure the correctness of the problem, prevent or reduce unnecessary errors.