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Study23
 2 years ago
Best ResponseYou've already chosen the best response.1This might answer your question, @Kainui. http://j.mp/IElIDt

vamgadu
 2 years ago
Best ResponseYou've already chosen the best response.1basically factorial is defined for positive integers only. but as 0! occurs very frequently we cheat upon our own definitions. n!=n(n1)! substitute n=1 => 0!=1
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