definite-integral

Question: The smallest interval $[a,\,\,b]$ such that $\int_{0}^{1}{\frac{dx}{\sqrt{1+{{x}^{4}}}}}\in [a,\,\,b]$ is given by



1) $\left[ \frac{1}{\sqrt{2}},\,\,1 \right]$
2) $[0,\,\,1]$
3) $\left[ \frac{1}{2},\,\,2 \right]$
4) $\left[ \frac{3}{4},\,\,1 \right]$
Solution: Explanation: No Explanation
Properties of definite integration

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