$\int\limits_0^{\frac{1}{2}} \frac{1}{1 - x^2} \ln \left( \frac{1 + x}{1 - x} \right) dx$ ની કિંમત શોધો.

  • A
    $\frac{1}{4} \ln^2 \left( \frac{1}{3} \right)$
  • B
    $\frac{1}{2} \ln^2 3$
  • C
    $-\frac{1}{4} \ln^2 3$
  • D
    ગણી શકાતું નથી.

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ધારો કે $f: R \rightarrow R$ એ $f(x)=\frac{x}{(1+x^4)^{1/4}}$ દ્વારા વ્યાખ્યાયિત વિધેય છે અને $g(x)=f(f(f(f(x))))$ છે,તો $18 \int_0^{\sqrt{2\sqrt{5}}} x^3 g(x) dx$ ની કિંમત શોધો.

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$\int_{\pi /3}^{\pi /2} \frac{\sqrt{1 + \cos x}}{(1 - \cos x)^{5/2}} \,dx = $

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