આપેલ છે કે $\int_0^\infty \frac{x^2 \, dx}{(x^2 + a^2)(x^2 + b^2)(x^2 + c^2)} = \frac{\pi}{2(a + b)(b + c)(c + a)}$,તો $\int_0^\infty \frac{x^2 \, dx}{(x^2 + 4)(x^2 + 9)}$ ની કિંમત શોધો.

  • A
    $\frac{\pi}{60}$
  • B
    $\frac{\pi}{20}$
  • C
    $\frac{\pi}{40}$
  • D
    $\frac{\pi}{80}$

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