Nomer 1 dan 2 ya aku pusing niii

1. S = {1,2,3,4,5,6,7,8,9}
P = {5,6,7,8,9}
Q = {2,4,6,8}
P irisan Q = {6,8}
jawaban B.
2. P = {a, b, c, d}
Q = { 4 abjad pertama } = {a, b, c, d}
maka P union (gabungan) Q = nP = nQ = {a, b, c, d}