law of exponents
The following is a list of laws useful for combining exponents of numbers:

Multiplication: axay = ax+y
Division: ax/ay = ax-y
Power of a power: (ax)y = axy
Negative exponent: a-x = 1/ax

Any number, except zero, with the exponent 0 is equal to 1. For example, 1000 = 1.

Related Term: exponent

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