Chapter 2 - Set Theory - 2.3 Venn Diagrams and Set Operations - Exercise Set 2.3 - Page 81: 58

C ∪∅ = {b,c,d,e,f}

U = {a,b,c,d,e,f,g,h} C = {b,c,d,e,f} The set C ∪∅ represents all the elements of A and the elements of ∅ which are not in C. As we know ∅ represents empty set. The elements of C ∪∅ are b,c,d,e,f. C ∪∅ = {b,c,d,e,f}