MathematicsMedium179×since 2002Q4238If limx→∞(x2−x+1−ax)=b\mathop {\lim }\limits_{x \to \infty } \left( {\sqrt {{x^2} - x + 1} - ax} \right) = bx→∞lim(x2−x+1−ax)=b, then the ordered pair (a, b) is :A(1,12)\left( {1,{1 \over 2}} \right)(1,21)B(1,−12)\left( {1, - {1 \over 2}} \right)(1,−21)C(−1,12)\left( { - 1,{1 \over 2}} \right)(−1,21)D(−1,−12)\left( { - 1, - {1 \over 2}} \right)(−1,−21)Check answerSkip