જો $f(x) = \frac{1-x+\sqrt{9x^2+10x+1}}{2x}$ હોય,તો $\lim_{x \rightarrow -1^{-}} f(x) = $

  • A
    $1$
  • B
    $-1$
  • C
    $0$
  • D
    $-1/5$

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