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Let ?: ℝ → ℤ be defined as ?(?) = ⌊?⌋. a.) Is f one-to-one? b.)Is...

Let ?: ℝ → ℤ be defined as ?(?) = ⌊?⌋.
a.) Is f one-to-one?
b.)Is f onto?
c.) Is f a bijection?
d.)How would your answers change if ℝ is changed to ℤ?

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