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If the function f: R -{1,-1} to A defind...

If the function `f: R -{1,-1} to A` definded by `f(x)=(x^(2))/(1-x^(2))`, is surjective, then A is equal to

A

`R -{-1]`

B

`[0, infty)`

C

`R -[-1,0]`

D

`R-(-1,0)`

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The correct Answer is:
C
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