ધારો કે $I(x) = \int \frac{(x+1)}{x(1+x e^x)^2} dx, x > 0$. જો $\lim_{x \rightarrow \infty} I(x) = 0$ હોય,તો $I(1)$ ની કિંમત શોધો.

  • A
    $\frac{e+1}{e+2} - \log_e(e+1)$
  • B
    $\frac{e+1}{e+2} + \log_e(e+1)$
  • C
    $\frac{e+2}{e+1} + \log_e(e+1)$
  • D
    $\frac{e+2}{e+1} - \log_e(e+1)$

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ધારો કે $f(x) = \int \frac{2x}{(x^2+1)(x^2+3)} dx$. જો $f(3) = \frac{1}{2}(\log_e 5 - \log_e 6)$ હોય,તો $f(4)$ ની કિંમત શોધો.

$\int \frac{x}{(x-1)(x-2)} dx = $ . . . . . . $+ C$.

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