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Let R be a relation such that R={(a d) (...

Let R be a relation such that R={(a d) (c g) (d e) (d f) (g f)} then (R@R^(-1))^(-1) is qquad {(d d) (g g) (e e) (f f) (e f) (f e)} O{(e a) (f a) (f c)} O{(a e) (a f) (c f) O{(d d) (g g) (e e) (f f) (e f)}

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