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What is the base number in junior one mathematics?
The operation of multiplying n identical factors like this is called power. The result of power n is called power. In the n-th power of a, a is called the base, n is called the exponent, and the n-th power is pronounced as the n-th power of a.

For example, in the n power of a

A refers to the cardinal number, and n refers to the result of exponential power and exponential power.