$\int \frac{x+1}{x(1+x e^x)^2} \,d x=$

  • A
    $\log \left|\frac{x e^x}{1+x e^x}\right|+\frac{x}{1+x e^x}+c$
  • B
    $\log \left|\frac{x e^x}{1+x e^x}\right|+\frac{e^x}{1+x e^x}+c$
  • C
    $\log \left|\frac{x e^x}{1+x e^x}\right|+\frac{1}{1+x e^x}+c$
  • D
    $\log \left|\frac{x e^x}{1+x e^x}\right|-\frac{1}{1+x e^x}+c$

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

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