1.Relation and Function
hard

વાસ્તવિક સંખ્યા  $x$ અને $y$ માટે જો $ xRy \in $ $x - y + \sqrt 2 $ એ અંસમેય સંખ્યા હોય તો સંબંધ  $R$ એ . . . .

A

સ્વવાચક

B

સંમિત

C

પરંપરિત

D

એકપણ નહી.

Solution

(a) For any $x \in R,$ we have $x – x + \sqrt 2 = \sqrt 2 $ an irrational number.

==> $xRx$ for all $x$. So, $R$ is reflexive.

$R$ is not symmetric, because $\sqrt 2 R1$ but $1\,\not R\,\sqrt 2 $, $R$ is not transitive also because

$\sqrt 2 R1$ and $1R2\sqrt 2 $ but $\sqrt 2 \,\not R\,2\sqrt 2 $.

Standard 12
Mathematics

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