我们在解题时,分母有理化很容易想到,但分子有理化的手法常常被我们忽略,成为解题的“盲点”。事实上,解决有些根式类问题的关键就在于分子有理化,因此,分子有理化在解题中的应用应引起重视。本文试举几道典型例子加以阐述。 When we solve problems, the denominator is very easy to think of physics and chemistry. However, the rationalization of molecules is often ignored by us and becomes the “blind spot” for solving problems. In fact, the key to solving some radical problems lies in the rationalization of molecules. Therefore, the application of molecular rationalization in problem solving should be emphasized. This article gives a few typical examples to illustrate.