Problem

甲、填充題：共 10 題，每題 8 分，共 80 分。請將答案依題號順序寫在答案卷上，不必寫演算過程。

5. Suppose that $x$ and $y$ are related by the equation $x=\displaystyle\int_0^y \frac{1}{\sqrt{1+4t^2}}\,dt$. Find $\dfrac{dy}{dx}$. Answer : \underline{\quad(1)\quad}