Question

Se considera multimile:A={1;2} si B={0;1;2}. a) A U B={...}; b) A intersectat cu B={...}; c) A × B={...}.

Answer 1

$a)~A\cup B=\{0,1,2\}=B,~deoarece~B\supset A$
$b)~A\cap B=\{1,2\}=A,~deoarece~A\subset B$
$A\times B=\{(1,0),(1,1),(1,2),(2,0),(2,1),(2,2)\}$

Answer 2

AUB=(0,1,2)

AnB=(1,2)

AXB=(1,0),(1,1),(1,2),(2,0),(2,1),(2,2)