Find the union pairof set:A = 1, 2, 3 and B = - Vidyadip

Question

Find the union pairof set:A = {1, 2, 3} and B = $\phi$

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Answer

Here A = {1, 2, 3} and$B = \phi ,\,\,\therefore A \cup B = \{ 1,2,3\} $

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