Minimum value of `x^2+ 1/(x^2+1) -3` is

The minimum value of x^(2)+(1)/(1+x^(2)) is at

Choose the correct answer. For all real values of x , the minimum value of (1-x+x^2)/(1+x+x^2) is a)0 b)1 c)3 d)1/3

The minimum value of 2x^2 +x-1 is

For all real values of x, the minimum value of (1-x+x^2)/(1+x+x^2) is(A) 0 (B) 1 (C) 3 (D) 1/3

If x is real then the minimum value of (x^(2)-x+1)/(x^(2)+x+1) is