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2.Relations and Functions
easy
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