How is 0! (zero factorial) equal to 1 (mathematical proof)?
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:Simple “Proof” Why Zero Factorial is Equal to One
Simple “Proof” Why Zero Factorial is Equal to OneWhat it means is that you first start writing the whole number n then count down until you reach the whole number 1. For the equation to be true, we must force the value of zero factorial to equal 1, and no other. Otherwise, 1! ≠1 which is a contradiction.
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the up who mentioned is correct
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