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

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

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

If f(x)=(x^(2)-1)/(x^(2)+1). For every real number x then the minimum value of f. does not exist because f is unbounded is not attained exen through f is bounded is equal to 1 is equal to -1

If f(x)=(x^2-1)/(x^2+1) , for every real x , then the maximum value of f

If f(x) = frac {x^2 -1}{x^2 +1} , for every real x, then the minimum value of f(x) is.

If f(x) = (x-1)/(x+1) , then f(2) is equal to

If f(x) = (x-1)/(x+1) , then f(2) is equal to

If f(x)=(x-1)/(x+1) then f(2x) is equal to