સૌથી નાનો અંતરાલ $[a, b]$ કે જેથી $\int_0^1 \frac{dx}{\sqrt{1 + x^4}} \in [a, b]$ થાય,તે શોધો.

  • A
    $[\frac{1}{\sqrt{2}}, 1]$
  • B
    $[0, 1]$
  • C
    $[\frac{1}{2}, 2]$
  • D
    $[\frac{3}{4}, 1]$

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