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

  • 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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જો $\int \frac{x+3}{(x-1)^2(2 x-1)} d x=\frac{A}{x-1}+B \log (2 x-1)+C \log (x-1)+K$ હોય, તો $A+B+C=$

$\int \frac{dx}{(x+1)(x+2)}$ નું મૂલ્ય શું છે?

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