Dane są zbiory:A={x:x∈ N i x≤7} B={x:x∈C i -5

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} (BnC)u A = A = {0,1,2,3,4,5,6,7} bo (BnC) jest zbiorem pustym (A/B)uC = C = {5,6,7,8,9} bo (AB) jest zbiorem {5,6,7}