1.

For any two sets A and B, prove that: A ∩ B = ϕ A B’.

Answer»

Let x be any element of Set A 

And y be any element of Set B 

Now 

x≠y A ∩ B = ϕ 

This means no element of B should be in A. 

Thus, 

x is an element of A and an element of B’ 

As x ϵ B’ 

A B’ 

Hence, Proved.



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