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Let f: R to R be defined by f(x)=(x)/(1...

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

A

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

B

`R ~ [-1,1]`

C

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

D

`(-1,1) ~ {0}`

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