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Showthat thefunction f : R to R : f (x) = {[-1 \ if \ x \ is \ irrational ], [1 \ if \ x \ is \ rational ]} ismany-oneinto. Find(i) f ((1)/(2)) \ (ii)f (sqrt(2))\ (iii) f (pi) \ (iv)f (2 +sqrt(3)) |
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