यदि $A \times B =\{(a, x),(a, y),(b, x),(b, y)\}$ तो $A$ तथा $B$ ज्ञात कीजिए।

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If is given that $A \times B=\{(a, x),(a, y),(b, x),(b, y)\}$

We know that the Cartesian product of two non-empty sets $P$ and $Q$ is defined as

$P \times Q=\{(p, q): p \in P, q \in Q\}$

$\therefore $  $A$ is the set of all first elements and $B$ is the set of all second elements.

Thus, $A=\{a, b\}$ and $B=\{x, y\}$

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यदि $A$ और $ B$ दो समुच्चय हैं, तब $A × B = B × A $ यदि और केवल यदि