Question

Pentru multimile M = {0,2,6,12,20} si P= {a | a=x · (x+1), x ∈ N si x < 5}
Determinati nr afirmatiilor corecte:

a) M⊂O; b) M=P;

c) P⊂M; d) M ≠ P;

Answer 1

Aflam multimea P

daca x =0, a= 0

daca x=1, a= 1×2= 2

daca x=2, a= 2×3= 6

daca x =3, a= 3×4= 12

daca x=4, a= 4×5= 20

P={0,2,6,12,20}

M={0,2,6,12,20}

a) M inclus P Adevarat

b) A

c) A

d) F