यदि $f(x) = \frac{e^x}{1+e^x}$, $l_1 = \int_{f(-a)}^{f(a)} x g(x(1-x)) dx$ और $l_2 = \int_{f(-a)}^{f(a)} g(x(1-x)) dx$ है, तो $\frac{l_2}{l_1}$ का मान ज्ञात कीजिए।

  • A
    -$1$
  • B
    -$3$
  • C
    $2$
  • D
    $1$

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