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2. Se dau mulţimile: A = {xe N/ 12x ≤ 24}; B = {yeN*/5y ≤25}; C={zeN/z-2≤ 2}. Aflați: a) AUBUC; b) BOC; c) An Bn C; d) (AUB) nc. 4)-8A/D VA ROG AM NEVOIE FT URGENT!!!!​