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Let f:N rarr N defined by f(n)={{:((n+...

Let `f:N rarr N` defined by
`f(n)={{:((n+1)/(2) " if n is odd"),(n/2" if n is even"):}` then `f` is

A

one - one nad onto

B

one- one but not onto

C

onto but not one- one

D

neither one -one nor onto.

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The correct Answer is:
B
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