4. Let f be the function defined from Z to Z by f(n) = [n/3]. (a) Is f one-to-one? Justify your answer. (b) Is f onto? Justify your answer. (discrete math)

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4. Let f be the function defined from Z to Z
by f(n) = [n/3].
(a) Is f one-to-one? Justify your answer.
(b) Is f onto? Justify your answer.
(discrete math)
Transcribed Image Text:4. Let f be the function defined from Z to Z by f(n) = [n/3]. (a) Is f one-to-one? Justify your answer. (b) Is f onto? Justify your answer. (discrete math)
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