यदि $f(x) = \frac{1-x+\sqrt{9x^2+10x+1}}{2x}$ है,तो $\lim_{x \rightarrow -1^{-}} f(x) = $

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

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यदि $\lim _{x \rightarrow 0} \frac{e^{2 x}-1}{5 x}=l$ और $\lim _{x \rightarrow 1} \frac{2}{x-1} \log x=m$ है,तो वह त्रिघात समीकरण जिसके मूल $5l, m$ और $1$ हैं,क्या होगा:

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