D. Selisih (Difference) Notasi: − = { | ∈ dan Ø } = ∩ Contoh: 1. Jika = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} dan = {2, 4, 6, 8, 10} Maka − = {1, 3, 5, 7, 9} dan − = Ø 2. Jika = {0, 2, 4, 6, … } maka = {1, 3, 5, … } 9