Let X = {1,2,3,4,5,6,7,8,9}. ' Let R (1)...

Let `X = {1,2,3,4,5,6,7,8,9}. ' Let `R _(1)` be a relation in X given by `R_(1) = {(x,y): {x,y} sub {1,4,7}} or {x,y} sub {2,5,8} or {x,y} sub {3,6,9}.` Show that `R _(1) = R _(2).`

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The correct Answer is:

`R _(2) sub R _(1)`

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