The function f:R->[-1/2,1/2] defined as ...

The function `f:R->[-1/2,1/2]` defined as `f(x)=x/(1+x^2)` is

A

neither injective nor surjective

B

Invertible

C

Injective but not surjective

D

surjective but not injective

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The correct Answer is:

D

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