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  4. If A= x: x=2 x, x ∈ N and B= x: x=2 x-1, x ∈ N then (A ∩ B) prime is

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Q. If $A=\{x: x=2 x, x \in N\}$ and $B=\{x: x=2 x-1, x \in N\}$, then $(A \cap B)^{\prime}$ is

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Solution:

$ A=\{2,4,6,8, \ldots\}$
$ B=\{1,3,5,7, \ldots\} $
$ A \cap B=\phi$
$(A \cap B)^{\prime}=U$