A: In the form of n, a is called the base and n is called the exponent. According to the records, a is usually a constant.

For example:

2 x, where 2 is the radix and x is the exponent.

In addition, the concept of base will be used in many other places. I don't know if you have learned it. For example, it exists in a logarithmic function. It doesn't matter if you don't understand now. You just need to understand what I explained above.