Question

Determinati multimile x si y stiind ca indeplinesc simultan conditiile: a) xuy={1,2,3,4,5,6} ; b) x\y={1,4} ; c) y\x={3,5}

Answer 1

Stim ca xuy={1,2,3,4,5,6};
daca x\y={1,4}=> elementele 1 si 4 apartin multimii x
iar daca y\x={3,5}=> elementele 3 si 5 apartin multimii y
deci multimile sunt fie x={1,4,2} si y={3,5,6} sau x={1,4,6} si y={3,5,2}. :)