1.

Let I be the set of integer and f : I `rarr` I be defined as f(x) = `x^(2), x in I`, the function isA. bijectionB. injectionC. surjectionD. None of these

Answer» Correct Answer - D
`f(x) = x^(2), x in Z`
f(1) = 1
f(-1) = 1
`therefore` f is not one-one
Range of f is set of whole number.
Which is a subset of Z.
`therefore` f is not onto.


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