જો $\int(1+x) \log \left(1+x^2\right) d x=\left(x+\frac{x^2}{2}+\frac{1}{2}\right) \log \left(1+x^2\right)+g(x)+C$ હોય,તો $g(x)=$

  • A
    $-2 x-\frac{x^2}{2}+2 \tan ^{-1} x$
  • B
    $2 \tan ^{-1} x+\frac{x^2}{2}+\frac{x^3}{3}$
  • C
    $2 \tan ^{-1} x-\frac{x^2}{2}+3 x$
  • D
    $2 \tan ^{-1} x+3 x+\frac{x^3}{2}$

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$\int \frac{1}{(x^2+1)^2} dx = . . . . . .$

$\int \frac{dx}{a^2 \sin^2 x + b^2 \cos^2 x}$ ની કિંમત શું થાય?

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