題組內容
5. Determine whether the following functions from Z to Z are invertible (one-to-one and onto) functions or not?
(c) \( f(x) = x - \left\lfloor \frac{x}{2} \right\rfloor \). (5%)
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5. Determine whether the following functions from Z to Z are invertible (one-to-one and onto) functions or not?
(c) \( f(x) = x - \left\lfloor \frac{x}{2} \right\rfloor \). (5%)