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

Răspuns :

[tex]a)~A\cup B=\{0,1,2\}=B,~deoarece~B\supset A[/tex]
[tex]b)~A\cap B=\{1,2\}=A,~deoarece~A\subset B[/tex]
[tex]A\times B=\{(1,0),(1,1),(1,2),(2,0),(2,1),(2,2)\}[/tex]
AUB=(0,1,2)

AnB=(1,2)

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