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Q

Help me understand! If A={5,6,7} and B={}. Then which of the following is true?

If A={5,6,7} and B={}. Then which of the following is true?

  • Option 1)

    A\cap B= A

  • Option 2)

    A\cap B= B

  • Option 3)

    A\cap B= A\cup B

  • Option 4)

    A\cap B= U

 
Answers (1)
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As we learnt

 

OPERATION ON INTERSECTION -

 

φ A = φ 

-

 

 Since B=φ 

 B = φ. i.e. A  B = B

 


Option 1)

A\cap B= A

Option 2)

A\cap B= B

Option 3)

A\cap B= A\cup B

Option 4)

A\cap B= U

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