Question

Determinati elementele multimilor: A = {x|x ∈ N, x = 2k + 3, 1 ≤ k ≤ 5 } si B = {y|y ∈ N, 5^3 - 4 ≤ y ≤ 2^7 - 1}

Answer 1

2k+3 k=1=>2×1+3=5 k=2=>2×2+3=7 k=3=>2×3+3=9 k=4=>2×4+3=11 k=5=>2×5+3=13 A={5,7,9,11,13} 125-4=121 128-1=127 B{121,122,123,124,125,126,127}