If A = {1, 2, 3, 4}, B = {3, 4, 5, 6}, C = {5, 6, 7, 8 } and D = { 7, 8, 9, 10 }; find 

(i) A ∪ B (ii) A ∪ C (iii) B ∪ C (iv) B ∪ D (v) A ∪ B ∪ C (vi) A ∪ B ∪ D (vii) B ∪ C ∪ D

Answers (1)

(i) A ∪ B = {1, 2, 3, 4, 5, 6}

(ii) A ∪ C = {1, 2, 3, 4, 5, 6, 7, 8} 

(iii) B ∪ C = {3, 4, 5, 6, 7, 8} 

(iv) B ∪ D = {3, 4, 5, 6, 7, 8, 9, 10} 

(v) A ∪ B ∪ C = {1, 2, 3, 4, 5, 6, 7, 8} 

(vi) A ∪ B ∪ D = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} 

(vii) B ∪ C ∪ D = {3, 4, 5, 6, 7, 8, 9, 10}

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