यदि $\int_1^4 x \sqrt{x^2-1} \, dx = \alpha(k)^\beta$ है,तो $\alpha \beta$ का मान ज्ञात कीजिए।

  • A
    $\frac{9}{2}$
  • B
    $\frac{1}{2}$
  • C
    $\frac{1}{3}$
  • D
    $\frac{3}{2}$

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