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A Mapping from IN to N is defined as fol...

A Mapping from IN to N is defined as follows:
`f:lNtolN`
`f(n)=(n+5)^(2)," ninlN`
(IN is the set of natural numbers). Then

A

fis not one-to-one

B

f is onto

C

fis both one-to-one and onto

D

f ' is one-to-one but not onto

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