Question

If A ={2,3,5}, find AU∅ and ∅UA and compare.

Answer 1

A ={2,3,5},
AU∅ =  {2,3,5} U ∅ = {2,3,5} = A
∅UA =  ∅ U {2,3,5} = {2,3,5} = A
Both are same.

Answer 2

A = {2, 3, 5}
∅ is null set, which is means empty set both are same as {2,3,5}