Răspuns:
Explicație pas cu pas:
A={2,3,4} B={2,3,4,5}
a)2∈A adevarat
c) A⊂B adevarat
b) 5 ∉B fals
d){2,3,4} ⊂B adevarat
e)∅⊂B adevarat ∅=multimea vida=multimea fara niciun element
f){4,3,2}⊂ B adevarat
A = {x ∈ ℕ*/ 1 < x ≤ 4} = {2,3,4}
B = {x ∈ ℕ / 2 ≤ x ≤ 5} = {2,3,4,5}
a) 2 ∈ A (✓)
b) 5 ∉ B (✕)
c) A ⊂ B (✓)
d) {2,3,4} ⊂ B (✓)
e) ∅ ⊂ B (✓)
f) {4,3,2} ⊂ B (✓)
