乘方是《有理数》一章的一个重要概念，在学习这一基本概念时应注意以下六点：一、注意乘方的含义乘方有双重含义，一是表示一种运算，即求几个相同因数的积的运算．如an表示乘方，读作a的n次方；二是表示乘方的结果（称为幂），好an读作a的n次幂．也就是说，乘方不仅表示一种 Power is an important concept in the chapter “Rational Numbers.” When learning this basic concept, the following six points should be noted: First, pay attention to the meaning of the power. Power has double meanings. First, it represents an operation, that is, a few The operation of the product of the same factor. If an denotes the power, it is read as the power of a, and the second is the result of the power (called the power), so an is read as the power of a. In other words, power does not only mean