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Dau coronita AM NEVOIE URGENT!!!!

Reprezentati geometric intervalele: l1=(- infinit; 1], l2=(-1;3) si l3= [1;5].
Determinati: l1∩l2, l1∩l3, l2∩l3 l1∩l2∩l3, l1Ul2, l1Ul3, l2Ul3, l1Ul1Ul3, l1∩N, l2∩Z, l2∩N, l2U{-1;3}, l3\{1;5}, R\l1

VA ROOOGGG FRUMOS AM NEVOIE URGENT!!!!!!!! DAU CORONITA SI PUNCTE IN PLUS!!!!!!