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JEE Mains · Maths · STD 11 - 12. limits

यदि \(\lim _{x \rightarrow \infty}\left(\left(\frac{\mathrm{e}}{1-\mathrm{e}}\right)\left(\frac{1}{\mathrm{e}}-\frac{x}{1+x}\right)\right)^x=\alpha\), तो \(\frac{\log _{\mathrm{e}} \alpha}{1+\log _{\mathrm{e}} \alpha}\) = __________

  1. A \(e^{-1}\)
  2. B \(\mathrm{e}^2\)
  3. C \(e^{-2}\)
  4. D e
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Answer & Solution

Correct Answer

(D) e

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Detailed explanation

\begin{aligned} & \alpha=\lim _{x \rightarrow \infty}\left(\left(\frac{\mathrm{e}}{1-\mathrm{e}}\right)\left(\frac{1}{\mathrm{e}}-\frac{\mathrm{x}}{1+\mathrm{x}}\right)\right)^{\mathrm{x}}\left(1^{\infty} \text { form }\right) \\ & \therefore \alpha=\mathrm{e}^{\mathrm{L}} \\ &…

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