જો $I_n = \int_0^{\pi / 2} \sin^n(x) dx$ અને $I_n = (k) I_{n-2}$ હોય,તો $k$ ની કિંમત શું થશે?

  • A
    $\frac{n}{n-1}$
  • B
    $\frac{n-1}{n}$
  • C
    $\frac{n+1}{n}$
  • D
    $\frac{n}{n+1}$

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જો $S_n = \int_0^{\frac{\pi}{2}} \frac{\sin((2n-1)x)}{\sin x} dx$ અને $n$ એ પૂર્ણાંક હોય,તો $S_{n+1} - S_n =$

$\int\limits_0^\infty {\frac{{{x^3}}}{{1 + x + 2{x^2} + 2{x^3} + {x^4} + {x^5}}}} dx$

$\int_{-1/2}^{1/2} \log \left(\frac{1+x}{1-x}\right) dx=$

$ \int_{0}^{\pi / 4} \log \left(\frac{\sin x+\cos x}{\cos x}\right) d x $

જો $n$ એ ધન પૂર્ણાંક હોય અને $[x]$ એ $x$ થી વધતો ન હોય તેવો મહત્તમ પૂર્ણાંક હોય,તો $\int_0^n {\{x - [x]\} \,dx}$ ની કિંમત શોધો.

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