જો $f(x) = \int\limits_1^x \frac{\ln t}{1 + t} dt$ જ્યાં $x > 0$ હોય,તો સમીકરણ $f(x) + f(1/x) = 0$ નું સમાધાન કરતી $x$ ની કિંમત(ઓ) કઈ છે?

  • A
    $e^2$
  • B
    $e$
  • C
    $e^{-2}$
  • D
    બધા $x > 0$

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