$\int \frac{dx}{x\sqrt{x^4 - 1}}$ નું મૂલ્ય શું છે?

  • A
    $\frac{1}{2} \sec^{-1}(x^2) + k$
  • B
    $\log |x\sqrt{x^4 - 1}| + k$
  • C
    $x \log \sqrt{x^4 - 1} + k$
  • D
    $\log \sqrt{x^4 - 1} + k$

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