यदि $\mathop {\lim }\limits_{x \to 0} \frac{{\log (3 + x) - \log (3 - x)}}{x} = k$ है,तो $k$ का मान ज्ञात कीजिए।

  • A
    $0$
  • B
    $-\frac{1}{3}$
  • C
    $\frac{2}{3}$
  • D
    $-\frac{2}{3}$

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मान लीजिए $\alpha$ और $\beta$ वास्तविक संख्याएँ हैं जैसे कि $\lim _{x \rightarrow 0} \frac{1}{x^3}\left(\frac{\alpha}{2} \int_0^x \frac{1}{1-t^2} d t+\beta x \cos x\right)=2$ है। तो $\alpha+\beta$ का मान $....$ है। ($.40$ में)

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$\mathop {\lim }\limits_{x \to \infty } \frac{{{x^n}}}{{{e^x}}} = 0$ के लिए

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