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3. Let f N- : (a) Is f one-one? (b) Is fonto? (c) Let S = R be the function given by f (x)

3. Let f N- : (a) Is f one-one? (b) Is fonto? (c) Let S = R be the function given by f (x) = 1 {4}) 1, 2 Determine f-1 (S) 2x x + 1

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