$\int_{-2}^1 f(x) dx$ का मान ज्ञात कीजिए, जहाँ $f(x) = \begin{cases} 1-2x, & x \leq 0 \\ 1+2x, & x \geq 0 \end{cases}$

  • A
    $0$
  • B
    $2$
  • C
    $8$
  • D
    $6$

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मान लीजिए ${I_1} = \int_1^2 \frac{dx}{\sqrt{1 + x^2}}$ और ${I_2} = \int_1^2 \frac{dx}{x}$,तो:

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