\( \lim _{x \rightarrow-\infty}\left\{\sqrt{x^{2}-x+1}-a x-b\right\}=0 \) (A) \( a=1, b=\frac{1}...
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0\( \lim _{x \rightarrow-\infty}\left\{\sqrt{x^{2}-x+1}-a x-b\right\}=0 \)
(A) \( a=1, b=\frac{1}{2} \)
(B) \( a=1, b=-\frac{1}{2} \)
(C) none of these
(D) \( a=-1, b=\frac{1}{2} \)
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