U = {1, 2, 3, 4, 5, 6, 7}, A = {1, 2, 3, 7} এবং B = {2, 4, 6} হলে, A’∩ B’ এর মান কত?

প্রশ্ন: U = {1, 2, 3, 4, 5, 6, 7}, A = {1, 2, 3, 7} এবং B = {2, 4, 6} হলে, A’∩ B’ এর মান কত?

সমাধান:
এখানে,
U = {1, 2, 3, 4, 5, 6, 7},
A = {1, 2, 3, 7}
এবং B = {2, 4, 6}

A’ = U - A = {1, 2, 3, 4, 5, 6, 7} - {1, 2, 3, 7}
= {4, 5, 6}
B’ = U - B = {1, 2, 3, 4, 5, 6, 7} - {2, 4, 6}
= {1, 3, 5, 7}

∴ A’∩ B’ = {4, 5, 6} ∩ {1, 3, 5, 7}
= {5}