$\int_{0}^{\infty} \frac{x}{(1+x)(x^{2}+1)} dx$ નું મૂલ્ય શું છે?

  • A
    $2 \pi$
  • B
    $\frac{\pi}{4}$
  • C
    $\frac{\pi}{16}$
  • D
    $\frac{\pi}{32}$

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$\int_{\pi /2}^{\pi} \frac{1 - \sin x}{1 - \cos x} \, dx =$

નીચે આપેલા નિશ્ચિત સંકલનો માટે સાચો વિકલ્પ પસંદ કરો:
$(i)$ $\int_0^{\pi / 2} \sin ^m(x) \cos (x) d x = \frac{1}{m+1}$
(ii) $\int_0^{\pi / 2} \sin (x) \cos ^n(x) d x = \frac{1}{n+1}$

જો $I$ એ $I_1=\int_0^1 e^{-x} \cos ^2 x \, dx, I_2=\int_0^1 e^{-x^2} \cos ^2 x \, dx, I_3=\int_0^1 e^{-x^2} \, dx, I_4=\int_0^1 e^{-x^2 / 2} \, dx$ માંથી સૌથી મોટું હોય, તો

જો $\int_0^3 (3x^2 - 4x + 2) dx = k$ હોય, તો $3x^2 - 4x + 2 = \frac{3k}{5}$ નું અંતરાલ $[0, 3]$ માં આવેલું બીજ કયું છે?

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