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

  • A
    $\log(1 + e^x) - x - e^{-x} + c$
  • B
    $\log(1 + e^x) + x - e^{-x} + c$
  • C
    $\log(1 + e^x) - x + e^{-x} + c$
  • D
    $\log(1 + e^x) + x + e^{-x} + c$

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यदि $\int \frac{dx}{(x-1)^{3/2}(x-3)^{1/2}} = \sqrt{f(x)} + c$ है,तो $f(-1) - f(0) =$ ज्ञात कीजिए।

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

मान लीजिए $f(x) = x$, $f_1(x) = f(\log x)$, $f_2(x) = f_1(\log x)$, $f_3(x) = f_2(\log x) \dots$ इत्यादि। तब $\int \frac{1}{f(x) f_1(x) f_2(x) \dots f_{2026}(x)} dx = \dots$

$\int \frac{dx}{\sqrt{(x-1)(x-2)}}=$

$\int \frac{x+\sin x}{1+\cos x} d x$ का मान ज्ञात कीजिए।

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