Let $R = \{(a, a)\}$ be a relation on a set $A$. Then $R$ is
Symmetric
Antisymmetric
Symmetric and antisymmetric
Neither symmetric nor anti-symmetric
(c) It is obvious.
Which one of the following relations on $R$ is an equivalence relation
Let $H$ be the set of all houses in a village where each house is faced in one of the directions, East, West, North, South. Let $R = \{ (x,y)|(x,y) \in H \times H$ and $x, y$ are faced in same direction $\}$ . Then the relation $' R '$ is
Consider set $A = \{1,2,3\}$ . Number of symmetric relations that can be defined on $A$ containing the ordered pair $(1,2)$ & $(2,1)$ is
Let ${R_1}$ be a relation defined by ${R_1} = \{ (a,\,b)|a \ge b,\,a,\,b \in R\} $. Then ${R_1}$ is
Let $r$ be a relation from $R$ (set of real numbers) to $R$ defined by $r = \{(a,b) \, | a,b \in R$ and $a – b + \sqrt 3$ is an irrational number$\}$ The relation $r$ is
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