First slide

Introduction to Relations (XI) on Sets

Question

Let $R = \{(1, 3), (2, 2), (3, 2)\}$ and $S = \{(2, 1), (3, 2), (2, 3)\}$ be two relations on set
$A = \{1, 2, 3\} .$ Then $RoS =$

Easy

A

$\{(1, 3), (2, 2), (3, 2), (2, 1), (2, 3)\}$
B

$\{(3, 2), (1, 3)\}$
C

$\{(2, 3), (3, 2), (2, 2)\}$
D

$\{(2, 3), (3, 2)\}$

Solution

Here $R = \{(1, 3), (2, 2); (3, 2)\}$ , $S = \{(2, 1); (3, 2); (2, 3)\}$
Then $RoS = \{(2, 3); (3, 2); (2, 2)\} .$

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