Question

fie multimea A[5:6:7] si B=[4;5] Multimea A reunit B este egala

Answer 1

$A = \Big\{5;6;7 \Big\}\\ B = \Big\{4;5 \Big\} \\ \\ A \cap B =\Big\{5;6;7 \Big\} \cap \Big\{4;5\Big\}\\ \\ \Rightarrow \boxed{A \cap B =\Big\{5 \Big\}}$