मान लीजिए $f(x) = \frac{1}{x} \ln \left( \frac{x}{e^x} \right)$,तो $x$ के सापेक्ष इसका आदिम (primitive) क्या होगा?

  • A
    $\frac{1}{2} \ln^2 x - x + C$
  • B
    $\frac{1}{2} \ln x - e^x + C$
  • C
    $\frac{1}{2} e^x - \ln x + C$
  • D
    $\frac{e^x}{2x} + C$

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