જો $\int e^{-x} \tan ^{-1}\left(e^x\right) d x = f(x) - \frac{1}{2} \log \left(1+e^{2 x}\right) + C$ હોય, તો $f(x)$ ની કિંમત શું થાય?

  • A
    $e^x - e^{-x} \tan ^{-1}\left(e^x\right)$
  • B
    $x^2 + e^{-x} \tan ^{-1}\left(e^x\right)$
  • C
    $-e^{-x} \tan ^{-1}\left(e^x\right)$
  • D
    $x - e^{-x} \tan ^{-1}\left(e^x\right)$

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ધારો કે $f(x) = \int \frac{dx}{x^{2/3} + 2x^{1/2}}$ એવું છે કે $f(0) = -26 + 24 \log_{e}(2)$. જો $f(1) = a + b \log_{e}(3)$, જ્યાં $a, b \in \mathbb{Z}$, તો $a + b$ ની કિંમત શોધો:

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