मान लीजिए $f(x) = \begin{cases} \frac{1}{3}, & x \le \pi/2 \\ \frac{b(1-\sin x)}{(\pi-2x)^2}, & x > \pi/2 \end{cases}$ है। यदि $f$, $x = \pi/2$ पर सतत है, तो $\int_0^{3b-6} |x^2+2x-3| dx$ का मान ज्ञात कीजिए।

  • A
    $5$
  • B
    $2$
  • C
    $3$
  • D
    $4$

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