Odpowiedzi

2009-12-10T17:16:52+01:00
(n+1)!=600+n!
n!(n+1)=600+n!
n!(n+1)-n!=600
n!(n+1-1)=600
n!*n=600
1*2*3*...*n*n=600
n=5

spr:
(n+1)!=(5+1)!=6!=720
n!=5!=120
720=600+120


voila!