$\int \frac{x}{1+x^4} \, dx =$

  • A
    $\frac{1}{2} \tan^{-1}(x^2) + c$,જ્યાં $c$ એ સંકલનનો અચળાંક છે
  • B
    $2 \tan^{-1}(x) + c$,જ્યાં $c$ એ સંકલનનો અચળાંક છે
  • C
    $\frac{1}{2} \tan^{-1}(x) + c$,જ્યાં $c$ એ સંકલનનો અચળાંક છે
  • D
    $\tan^{-1}(x^2) + c$,જ્યાં $c$ એ સંકલનનો અચળાંક છે

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$\int \cos ^3 x e^{\log (\sin x)^2} d x=$

$\int \frac{dx}{1+\sqrt{x}} = $

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