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Construct a Rule $f : \{ 1,2,3,4,5 \} \rightarrow \{ 3,6,9,12 \}$

Question 20

Essay

Construct a rule $f : \{ 1,2,3,4,5 \} \rightarrow \{ 3,6,9,12 \}$ that is (a) a function,(b) a one-to-one function.

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