Question

Aflați numerele naturale x, care satisfac relația :
X<4
Xmai mic sau egal 15
X+17 mai mic sau egal 17
X-30<30

Answer 1

x < 4 => x∈{0,1,2,3}
x ≤ 15 => x∈{0,1,2,....,14,15}
x+17 ≤ 17 => x ≤ 17-17=0 => x∈{0}
x-30 < 30 => x < 60 = x∈{0,1,2,.....,59}