1) Fie multimile A = {2, 4, 5, 8, 9}, B={1, 2, 4, 6, 7}, C={1, 5, 7, 10} Stabiliti care sunt propozitii adevarate * a) B\(A⋂C) = {1, 2, 4, 6} b) C\(A⋂B) = {1, 5, 7, 10} c) A\(B⋃C) = {8, 9} d) A\(B⋂C) = {2, 4, 5, 8, 9} e) C\(B\A) = {5, 7, 8} 2) Fie A = {9, 6, 8, 3}, B={8, 5, 7, 9}, C={2, 3, 4, 5}. Aflati A⋃(B⋂C) * a) A⋃(B⋂C) = {6,8,3} b) A⋃(B⋂C) = {9, 6, 8, 3} c) A⋃(B⋂C) ={9, 6, 8, 5} d) A⋃(B⋂C) = {9, 6, 8, 3, 5} e) A⋃(B⋂C)= {8} 3) Fie A = {10, 20, 30, 40}; B = {20, 25, 30, 35} Aflati A \ B * a) A \ B = {10, 20} b) A \ B = {10, 20, 30} c) A \ B = {10, 40} d) A \ B = {10, 15,20, 30} e) A ∩ B = { 10, 20, 30, 40, 25, 35 }

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