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Question: Answered & Verified by Expert
If $y=2^{x / \ln x}$ then $\frac{d y}{d x}$ at $x=e$ is
MathematicsDifferentiationJEE Main
Options:
  • A $\mathrm{e}$
  • B $2^{\mathrm{e}} \log 2$
  • C $\log 2$
  • D 0
Solution:
1516 Upvotes Verified Answer
The correct answer is: 0
$\log y=\frac{x}{\log x} \log 2$
$\left.\Rightarrow \frac{\mathrm{dy}}{\mathrm{dx}}\right]_{\mathrm{x}=\mathrm{e}}=0$

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