જો $\lim _{x \rightarrow \infty}\left(\frac{x^2+x+1}{x+1}-a x-b\right)=4$ હોય,તો:

  • A
    $a=1, b=4$
  • B
    $a=1, b=-4$
  • C
    $a=2, b=-3$
  • D
    $a=2, b=3$

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