Mathematics

Problem

28. For all real values of

x

, the minimum value of

\frac{1-x+x^{2}}{1+x+x^{2}}

is (A) 0 (B) 1 (C) 3 (D)

\frac{1}{3}

(A) 0 (B) 1 (C) 3 (D)

\frac{1}{3}