જો $2f(x) - 3f\left( \frac{1}{x} \right) = x$ હોય,તો $\int_1^2 f(x) \, dx$ ની કિંમત શોધો.

  • A
    $\frac{3}{5}\ln 2$
  • B
    $-\frac{3}{5}(1 + \ln 2)$
  • C
    $-\frac{3}{5}\ln 2$
  • D
    આમાંથી કોઈ નહીં

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