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

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

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ધારો કે $f(t) = \int \left( \frac{1 - \sin(\ln t)}{1 - \cos(\ln t)} \right) dt$,$t > 1$ માટે. જો $f(e^{\pi/2}) = -e^{\pi/2}$ અને $f(e^{\pi/4}) = \alpha e^{\pi/4}$ હોય,તો $\alpha$ ની કિંમત શોધો.

$\int e^x \left( \log x + \frac{1}{x} \right) dx$ ની કિંમત શોધો.

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