यदि $\phi(x) = \log_{5} \log_{3} x$ है,तो $\phi'(e)$ का मान ज्ञात कीजिए।

  • A
    $\frac{1}{e \ln 5 \ln 3}$
  • B
    $\frac{1}{e \ln 5}$
  • C
    $\frac{1}{e \ln 3}$
  • D
    $\frac{\ln 5}{e}$

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