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