Problem

甲、填充題：共 8 題，每題 8 分，共 64 分。請在答案卷上列出題號依序作答。

1. Determine the limits of integration where $a\le b$ such that $\displaystyle\int_a^b (x^2-16)\,dx$ has minimal value. Answer : \underline{\quad(1)\quad}