Question

determinati multimile A si B stiind ca AuB={1,2,3,4},cardA=cardB=2, daca x apartine A atunci x+1 apartune B

Answer 1

A U B = {1, 2, 3, 4}
card A = card B = 2
x ∈ A si x + 1 ∈ B.

Conform conditiilor de mai sus, rezulta ca A = {1, 3} si B = {2, 4}.
Verificare: A U B = {1, 2, 3, 4};
card A = card B = 2;
x = 1 ∈ A, x + 1 = 1 + 1 = 2 ∈ B
x = 3 ∈ A, x + 1 = 3 + 1 = 4 ∈ B.