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[" ii) If "f(x)=(x^(2)-1)/(x^(2)+1)," fo...

[" ii) If "f(x)=(x^(2)-1)/(x^(2)+1)," for every real "x" ,then the minimum value of "f" is "-],[[" (A) "1," (B) "0," (C) "-1," (D) "2]]

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