यदि $\int \frac{d x}{(x+2)\left(x^2+1\right)}=a \log \left|1+x^2\right|+b \tan ^{-1} x+\frac{1}{5} \log |x+2|+c$ है,तो

  • A
    $a=\frac{-1}{10}, b=\frac{2}{5}$
  • B
    $a=\frac{1}{10}, b=\frac{2}{5}$
  • C
    $a=\frac{-1}{10}, b=\frac{-2}{5}$
  • D
    $a=\frac{1}{10}, b=\frac{-2}{5}$

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$\int \frac{x^{2}}{\left(x^{2}+1\right)\left(x^{2}+4\right)} d x$ ज्ञात कीजिए।

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