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14). Aflați xe N dacă:
a). {5, x, 8) n (2, 3, 5} = {3,5}
c). (5, 6, x} U {3, 5} = {3, 5, 6}
e). {3, 5, x} - {4, 5} = {3} g). {3, 8, x}-{5, 3, 8, 9} =Ø i). {6, 7, 3}-{2, x} = {6, 7}
b). {7, 8, x, 2} {2, 8, 9} = {2,8} d). (8, 10, 16, x) U (2, 8) = {2, 8, 10, 9, 16)
f). {5, 6, x} - {6, 7} = {5, 8}
h). {7, 8, 9}-{7, x} = {8}
Cu explicatie va roggg! Dau coroana!!!​