for solution of Q3.
We have to find Cartesian Product of A={2,3,4,5,6,7,8}
As
A×A={2,3,4,5,6,7,8}×{2,3,4,5,6,7,8}
there will be 49 members.
But R has only those in which y is divisible by x
And draw Directed Graph as following.
Loop at all elements of A , proves that R is Reflexive Relation.
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