ધારો કે $f(x) = \frac{1}{x} \ln \left( \frac{x}{e^x} \right)$,તો $x$ ની સાપેક્ષે તેનું પ્રતિવિકલિત (primitive) શું થાય?

  • A
    $\frac{1}{2} \ln^2 x - x + C$
  • B
    $\frac{1}{2} \ln x - e^x + C$
  • C
    $\frac{1}{2} e^x - \ln x + C$
  • D
    $\frac{e^x}{2x} + C$

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જો $f^{\prime}(x)=x-\frac{5}{x^5}$ અને $f(1)=4$ હોય,તો $f(x)$ શું થાય?

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