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A function f from the set of natural num...

A function f from the set of natural numbers to integers defined by : `f(n)={:[((n-1)/(2)",""when n is odd"),(-(n)/(2)",""when n is even"):}` is :

A

neither one-one nor onto

B

one-one but not onto

C

onto but not one-one

D

both one-one and onto

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The correct Answer is:
D
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