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If X={(1,2,3,4,5} and Y={1,3,5,7,9}, then find which of the following sets are functions from X to Y? (i) R_(1)={(x,y):y=x+2, x in X, y in Y} (ii) R_(2) ={(1,2),(2,1),(3,3),(4,3), (5,3)} (iii)R_(3)={(1,1),(1,3),(3,5),(3,7),(5,7)} (iv) R_(4)={(1,3),(2,5),(4,7),(5,9),(3,1)} |
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