যদি A = {1, 2, 3, 4, 5, 6, 7}, B = {2, 3, 5, 6} এবং C = {4, 7, 8, 9} হয়, তবে (A - B) ∪ C = কত?

প্রশ্ন: যদি A = {1, 2, 3, 4, 5, 6, 7}, B = {2, 3, 5, 6} এবং C = {4, 7, 8, 9} হয়, তবে (A - B) ∪ C = কত?

সমাধান:
দেওয়া আছে, A = {1, 2, 3, 4, 5, 6, 7},
B = {2, 3, 5, 6}
এবং C = {4, 7, 8, 9}

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

∴ (A - B) ∪ C = {1, 4, 7} ∪ {4, 7, 8, 9}
= {1, 4, 7, 8, 9}