Let A={1,2,3,4,6} . Let R be relation on A defined by { (a,b):a,b ∈ A,b is exactly divisible by a}

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2.Relations and Functions

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Let $A=\{1,2,3,4,6\} .$ Let $R$ be the relation on $A$ defined by $\{ (a,b):a,b \in A,b$ is exactly divisible by $a\} $

Write $R$ in roster form

Option A

Option B

Option C

Option D

Solution

$A = \{ 1,2,3,4,6\} ,R = \{ (a,b):a,b \in A,{\rm{ }}$ bisexactlydivisible by $a\} $

$R=\{(1,1),(1,2),(1,3),(1,4),(1,6),(2,2),(2,4),(2,6),$

$(3,3),(3,6),(4,4),(6,6)\}$

Standard 11

Mathematics

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