Q1 of 23 Page 38

If A = {1, 2, 3, 4}; B = {1, 2, 3, 5, 6} then find and Are they equal?

We know that the intersection of sets A and B is the set of all elements which are common to A and B.


The common elements in both A and B are 1, 2, 3.


⇒ A ⋂ B = {1, 2, 3, 4} ⋂ {1, 2, 3, 5, 6} = {1, 2, 3}


⇒ B ⋂ A = {1, 2, 3, 5, 6} ⋂ {1, 2, 3, 4} = {1, 2, 3}


∴ A ⋂ B = B ⋂ A


Ans. Yes, A ⋂ B & B ⋂ A are same.


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(a) {x : x is prime number and a divisor of 6}


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(c) {x : x is a natural number and divisor of 6}


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A = {0, 2, 4}, find and Comment.

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