tolong dong nomer 2...... tolong pakek cara...

A = {1,2,3}
B = {2,3}
C = {1,2,3,5,6,10,15,25,30,75,150}
D = {3,4,5,6,7,8,9}

a. {1,2,3}
b. {1,2,3,5,6,10,15,25,30,75,150}
c. {2,3,4,5,6,7,8,9}
d. {1,2,3,5,6,10,15,25,30,75,150}