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Let f:RtoR be defined by f(x)=x/(1+x^2),...

Let `f:RtoR` be defined by `f(x)=x/(1+x^2),x inR`. Then the range of f is

A

(-1,1)-{0}

B

`[- 1/2,1/2]`

C

`R-[- 1/2,1/2]`

D

R-[-1,1]

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The correct Answer is:
B
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