$\lim _{x \rightarrow-\infty} \log _e(\cosh x)+x=$

  • A
    $\log 2$
  • B
    $-\log 2$
  • C
    $\log \left(\frac{1}{2}\right)+2$
  • D
    $\log \left(\frac{1}{2}\right)-2$

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$\mathop {\lim }\limits_{x \to 1} f(x)$ ज्ञात कीजिए,जहाँ $f(x) = \begin{cases} x^{2}-1, & x \leq 1 \\ -x-1, & x > 1 \end{cases}$

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मान लीजिए $f(x) = \frac{x - 1}{2x^2 - 7x + 5}$. तो:

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