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If set A and B are such that $A\cap B= \phi$ . Then which of the following is true?

Option 1)
$A\cup B= \phi$

Option 2)
$A\cup B= A$

Option 3)
$A\cup B= B\cup A$

Option 4)
$A\cup B= B$

Answers (1)

best_answer

As we learnt

COMMUTATIVE PROPERTY OF UNION -

A ∪ B = B ∪ A

-

Option 1)

$A\cup B= \phi$

Option 2)

$A\cup B= A$

Option 3)

$A\cup B= B\cup A$

Option 4)

$A\cup B= B$

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Himanshu

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