જો $M=\int_0^{\infty} \frac{\log t}{1+t^3} d t$ અને $N=\int_{-\infty}^{\infty} \frac{t e^{2 t}}{1+e^{3 t}} d t$ હોય,તો

  • A
    $N=2 M$
  • B
    $N=M$
  • C
    $N=3 M$
  • D
    $N=-M$

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ધારો કે $g(t) = \int_{-\pi/2}^{\pi/2} \cos \left(\frac{\pi}{4} t + f(x)\right) \, dx$,જ્યાં $f(x) = \log_e \left(x + \sqrt{x^2 + 1}\right)$,$x \in R$. તો નીચેનામાંથી કયું સાચું છે?

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