(Q15).If A = {2, 3, 5}, find A ∪ ∅ and ∅ ∪ A and compare.

Given sets A = {2, 3, 5} and ∅ = { }

A ∪ ∅ = {2,3,5} ∪ { } = {,,}

∅ ∪ A = { } ∪ {2, 3, 5} = {,,}

A ∪ ∅ = ∅ ∪ A =