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Let A={1,2,3,......, 12} and R be a rela...

Let `A={1,2,3,......, 12}` and R be a relation in `A xx A` defined by `(a, b) R (c,d)` if `ad=bc AA(a,b),(c,d) in A xx A`. Prove that R is an equivalence relation. Also obtain the equivalence class `[(3,4)]`.

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The correct Answer is:
`[(3,4)]={(3,4),(6,8),(9,12)}`
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