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abt factorial of a number (Discussion)

b siddiram reddy saidThu, 05 Nov 2009 06:47:27 -0000 ( Link )

why factorial of zero is one

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  1. mbourne saidMon, 09 Nov 2009 04:02:48 -0000 ( Link )

    This is a convention. That is, if we don’t all agree that 0! = 1, then lots of formulas fail (even though we know they work!)

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