Răspunsuri

2014-10-30T12:00:38+02:00
N = 11c + r    r=2c   ⇒ r= nr.par   r < 11 ⇒ r∈{2,4,6,8,10} ⇒⇒
c∈{1,2,3,4,5}
n=11c+2c = 13c ⇒ n∈{13.26.39.52,65}
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