JEE Math Practice Question
The function $f: \mathbf{N}-\{1\} \rightarrow \mathbf{N}$; defined by $f(\mathrm{n})=$ the highest prime factor of $\mathrm{n}$, is :
- A.one-one only
- B.neither one-one nor onto
- C.onto only
- D.both one-one and onto
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