Question

If A = {6, 9, 11}; B = { }, find A ∪ φ.

Answer 1

A ∪ φ= A

hope this helps you

Answer 2

Answer:

A ∪ φ =  {6, 9, 11}

A U B = {6, 9, 11}  

Step-by-step explanation:

A = {6, 9, 11}

B = { }

B = φ

A ∪ φ = A

=> A ∪ φ =  {6, 9, 11}

A U B = A  as B is empty set

A U B = {6, 9, 11}  

A ∩ φ = φ

A ∩ B = B  as B is empty set

A ∩ B =   { }