Question

If U = {1, 2, 3, .......}; A = {2, 4, 6, 8, .......}; B = {1, 3, 5, .......}, then find (A $\cup$ B)'.

• A. A'
• B. B
• C. A
• D. $\varphi$

Answer 1

Answer: (D)

$\varphi$

Given,

$U=(1,2,3,....)$

$A=\{2,4,6,8,...\}$

$B=\{1,3,5,7,....\}$

We know,

$(A\cup B{)}^{\prime }=U-(A\cup B)$

Here

$A\cup B=\{1,2,3,....\}=U$

So $(A\cup B{)}^{\prime }=\varphi$.