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2009-12-04T16:43:27+01:00
A ={ x: x∈N i x ≤7}
B={x:x∈C i -5<x<5}
C={x:x∈N i 5≤x<10}
A = {0,1,2,3,4,5,6,7}
B = {-4,-3,-2,-1,0,1,2,3,4}
C = {5,6,7,8,9}
(B n C) u A = A = {0,1,2,3,4,5,6,7}
(A\B) u C = C = C = {5,6,7,8,9}
1 5 1