,FACTORIAL ,EXAMPLES #A4 ,SIX FACTORIAL IS WRITT5 _% #6& _: #B4 ,F\R FACTORIAL EQUALS TW5TY-F\R IS WRITT5 _% #4& .K #24 _: #C4 ,FIVE FACTORIAL EQUALS FIVE "T F\R "TS ?REE "TS TWO "TS "O IS WRITT5 _% #5& .K #5@*4@*3@*2@*1 _: #D4 ;N FACTORIAL EQUALS ;N "TS OP5 P>5!SIS ;N M9US "O CLOSE P>5!SIS "TS OP5 P>5!SIS ;N M9US TWO CLOSE P>5!SIS "TS ELLIPSIS "TS ?REE "TS TWO "TS "O IS WRITT5 _% N& .K N@*(N-1)@*(N-2)@* ''' @*3 @*2@*1 _: #E4 ,OP5 FRAC;N ;N FACTORIAL OV] OP5 P>5!SIS ;N M9US ;K CLOSE P>5!SIS FACTORIAL CLOSE FRAC;N IS WRITT5 _% ?N&/(N-K)&# _: #A #F4 ,OP5 FRAC;N FIVE FACTORIAL OV] "O FACTORIAL F\R FACTORIAL CLOSE FRAC;N IS WRITT5 _% ?5&/1&4&# _: #G4 ,OP5 FRAC;N ;N FACTORIAL OV] OP5 P>5!SIS ;N M9US ;R CLOSE P>5!SIS FACTORIAL ;R FACTORIAL CLOSE FRAC;N IS WRITT5 _% ?N&/(N-R)&R&# _: #B