1. Calculati: AUB , A intersectat cu B , a minus b , b minus a ... a) A=(-infinit ,2] , B=(-infinit,7)...b) A=(-infinit,4); B(-2;-infinit) ...c) A=[-2;-infinit] ;B= [-3;5]...d) A=(-3;7) ; B=[-2;5] URGENTT VA ROG!!!
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