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Why is 0!=1?? |
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Answer» By factorial method we counts how many ways a thing can happen . When we say a thing can happen only one way we can say either 0!or 1! This method which i understood why 0!=1. Now if u want 9! U will do 10!/10,if u want 8! U will do 9!/9 similarly so on still 2!/2=1! then same way for 0!(zero factorial what u need) u will do 1!/1 hence u will get 0!=1! Which is nothing but 1. Hope understood this.there are many other way also but this one gave satisfaction to me. |
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