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

  • A
    $-\log \left( \frac{xe^x}{1 + xe^x} \right) + \frac{1}{(1 + xe^x)} + c$
  • B
    $\log \left( \frac{xe^x}{1 + xe^x} \right) + \frac{1}{(1 + xe^x)} + c$
  • C
    $\log \left( \frac{1 + xe^x}{xe^x} \right) + (1 + xe^x) + c$
  • D
    $-\log \left( \frac{xe^x}{1 + xe^x} \right) - \frac{1}{(1 + xe^x)} + c$

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यदि $\int \frac{1}{(x^{2} + 4)(x^{2} + 9)} dx = A \tan^{-1} \frac{x}{2} + B \tan^{-1} \left( \frac{x}{3} \right) + C$ है,तो $A - B =$

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

$\int \frac{dx}{(x+1)(x+2)}$ का मान ज्ञात कीजिए।

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

परिमेय फलन का समाकलन कीजिए: $\frac{1-x^{2}}{x(1-2 x)}$

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