The factorial​ symbol, n!, is defined as ​n!equals​_______ and ​0!equals​_______.
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Part 1
The factorial​ symbol, n!, is defined as ​n!equals
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StartFraction n Over r left parenthesis n minus r right parenthesis EndFraction
n left parenthesis n minus 1 right parenthesis times ... times 3 times 2 times 1
Start Fraction n Over n 1 n 2 times times times n Subscript k End Fraction
Start Fraction n Over left parenthesis n minus r right parenthesis End Fraction
and ​0!equals
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1.
0.