Question

If M is any set, then write M ∪ Φ and M ∩ Φ

Answer 1

Let M = {2, 3, 4, 8} and Φ = { } 

∴ M ∪ Φ = {2, 3, 4, 8} 

∴ M ∪ Φ = M Also, M ∩ Φ = { } 

∴ M ∩ Φ = Φ