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If A = {1, 2, 3}, B = {1, 2}, find A $ \times $ B. Find the formula for the following relations (if any). \[\] $R_2$ = {(1, 2)}

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$R_2$ consists of all those ordered pairs of A $ \times $ B whose first coordinates are less than the second coordinates. Only one such ordered pair can be had from A $ \times $ B which is in $R_2$. Hence the formula that is in $R_2$ is ‘is less than’.
answered Jun 26, 2014 by thanvigandhi_1

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