Răspunsuri

2014-11-12T11:11:33+02:00
N=11c+r    r= 2c  n=11c +2c = 13c     r<11, ∈N pare ⇒ r∈ {2,4,6,8,10} ⇒ c∈{ 1,2,3,4,5} ⇒
n∈{13,26,39,52,65}
2 3 2