# Select all of the following that are functions with domain the set of real numbers and range (or codomain) the set of integers, i.e.?

f:ℝ→ℤ

A. f(x)=⌈x⌉

B. f(x)=√x^2

C. f(x)=⌈√x^2⌉

f(x)=√⌊x^2⌋

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