यदि $729 \int_1^3 \frac{1}{x^3(x^2+9)^2} dx = a + \log b$ है,तो $a - b =$

  • A
    $4$
  • B
    $-\frac{4}{5}$
  • C
    $\frac{4}{5}$
  • D
    $-4$

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यदि $\int {\frac{{(2{x^2} + 1)\,dx}}{{({x^2} - 4)({x^2} - 1)}} = \log \left[ {{{\left( {\frac{{x + 1}}{{x - 1}}} \right)}^a}\,{{\left( {\frac{{x - 2}}{{x + 2}}} \right)}^b}} \right]} + C,$ है,तो $a$ और $b$ के मान क्रमशः क्या हैं?

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