$\int \frac{x^2-1}{x^3 \sqrt{2 x^4-2 x^2+1}} d x$

  • A
    $\frac{1+2 x^2+2 x^4}{2 x^2}+c$
  • B
    $\frac{\left(1+2 x^2+2 x^4\right)^{\frac{1}{2}}}{2 x^2}+c$
  • C
    $\frac{1-2 x^2+2 x^4}{2 x^2}+c$
  • D
    $\frac{\left(1-2 x^2+2 x^4\right)^{\frac{1}{2}}}{2 x^2}+c$

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