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Base of a power
To write repeated multiplication in an exponential notation, you should write the number that has to be multiplied as the base. Count the number of times that the number is used.
Exponents can be used to simplify notation when the same factor is repeated
When we multiply two or more numbers we call them factors, and the result a product. If we multiply the same number a several time, we call it a repeating multiplication, where the factor is the number itself. For example, 5*5*5*5*5*5. In this multiplication the number 5 (or the factor 5) appears 6 times. We use the exponential form 56 as a short hand to represent this repeated multiplication of 5, and we call the factor 5 the base, and the number of its appearances in the multiplication, 6, the exponent.