If \( \lim _{x \rightarrow \infty}\left(\frac{x^{2}+x+1}{x+1}-a x-b...

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If \( \lim _{x \rightarrow \infty}\left(\frac{x^{2}+x+1}{x+1}-a x-b\right)=4 \), then
\( \mathrm{P} \)
(A) \( a=1, b=4 \)
(B) \( a=1, b=-4 \)
W
(C) \( a=2, b=-3 \)
(D) \( a=2, b=3 \)
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