This is easiest to explain with an example. One of the laws of exponents says that division of numbers containing exponents makes the exponents subtract from each other. For example, 24/23 = 2(4-3) = 21 = 2. Expanded to use numerical values, 16/8 = 2.
Similarly, 23/23 = 2(3-3) = 20 = 1. It therefore follows that anything to the power zero is equal to one.
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It is 1 because everything to the zero power is 1.
Anything to the power zero is equal to 1 by definition.
Any non-zero number, raised to the zero power is equal to 1.
Any number (except 0) raised to the power of 0 is equal to 1. Therefore, 9 to the zero power is 1, and 11 to the zero power is also 1. So, 9 to the zero power plus 11 to the zero power is equal to 1 + 1 = 2.
No. All real numbers, when raised to the power zero, are equal to 1. Even zero to the zero is equal to 1.