If ∫0a11+4x2dx=π8, then a = _______________.

1.	If ∫0a11+4x2dx=π8, then a = _______________.
Answer» If $\int_{0}^{a} \frac{1}{1 + 4 x^{2}} d x = \frac{π}{8},$ then a = _______________.

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