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The functon f: N rarr N, defined by f(n)...

The functon` f: N rarr N`, defined by` f(n)=2n+3`, for all `n in N`, is (here N is the set of natural numbers)

A

only onto

B

only one-one

C

both one-one and onto

D

none of these

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The correct Answer is:
B
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