यदि $\int \frac{dx}{x^4+5x^2+4} = A \tan^{-1} x + B \tan^{-1} \frac{x}{2} + c$,जहाँ $c$ समाकलन का एक स्थिरांक है,तो:

  • A
    $A = \frac{1}{3}, B = -\frac{1}{6}$
  • B
    $A = \frac{1}{3}, B = \frac{1}{6}$
  • C
    $A = \frac{1}{2}, B = -\frac{1}{4}$
  • D
    $A = \frac{1}{2}, B = \frac{1}{4}$

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