題組內容

4. The terrain of a specific area is defined as \(h(x,y) = \begin{cases} 5-\sqrt{x^2+y^2} & \text{, if } \sqrt{x^2+y^2} < 5 \\ 0 & \text{, otherwise} \end{cases}\)

(a) Find the surface elevations at point A(2,2). (5%)