jawab dengan benar.............

a.)
A={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20}
B={2,4,6,8,10,12,14}
C={1,3,5,7,9}
D={8,9,10,11,12,13,14}

b.)(BnC)
={2,4,6,8,10,12,14}n{1,3,5,7,9}
={ }
(BnD)
={2,4,6,8,10,12,14}n{8,9,10,11,12,13,14}
={8,10,12,14}
(CnD)
={1,3,5,7,9}n{8,9,10,11,12,13,14,15}
={9}

maaf kalo sala