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Let f(x) = (x^2 - 4)/(x^2 + 4) , for |x...

Let `f(x) = (x^2 - 4)/(x^2 + 4) ` , for `|x| ge 2` , then the function `f: (-oo , -2] cup [2, oo) to (-1,1)` is :

A

one-one into

B

one -one onto

C

many - onto into

D

many - one onto

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