Question

Determinati elementele multimilor:
A={n ∈ ℕ | 0 ≤n+1<5}
B={x | x ∈ ℕ si 13 }
∈=apartine
ℕ=Nr naturale
≤=Mai mic sau egal

Answer 1

0≤n+1<5
0≤n<5-1
0≤n<4 ⇒ n = 0,1,2,3 ⇒A={0,1,2,3}

x∈N si 13 ⇒ x=13⇒B={13}