A ={1,2,3} B =\(\phi \) হলে \(A \cup B\) =কত?

A ={1,2,3} B =\(\phi \) হলে \(A \cup B\) =কত?

A {1,2,3}

B {3}

C {2,4}

D {2,4,5 }

Solution

Correct Answer: Option A

A = {1,2,3} B =\(\phi \) \(A \cup B\) = {1,2,3}\( \cup \){\(\phi \)} = {1,2.3}