If f(x)=(x^2-1)/(x^2+1) . For every real...

If `f(x)=(x^2-1)/(x^2+1)` . For every real number `x ,` then the minimum value of `fdot` (a) does not exist because `f` is unbounded (b) is not attained even through `f` is bounded (c) is equal to 1 (d) is equal to `-1`

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If `f(x)=(x^2-1)/(x^2+1)` . For every real number `x ,` then the minimum value of `fdot` (a) does not exist because `f` is unbounded (b) is not attained even through `f` is bounded (c) is equal to 1 (d) is equal to `-1`

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