Răspunsuri

2014-10-14T19:58:38+03:00
Cel mai inteligent răspuns!
2014-10-14T20:01:53+03:00
N(n-1)(n-2)! / (n-2)! <56
n(n-1)<56
n²-n-56<0
si se rezolva inecuatia