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Determine whether each of these functions from Z to Z is onto 1. f(x) = x 1 2. f(x) = x 2 + 1 3.

Determine whether each of these functions from Z to Z is onto

1. f(x) = x 1

2. f(x) = x² + 1

3. f(x) = [x/2] (ceiling)

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