題目 4. (10 points) Find the arc length of the curve with equation x2/3+y2/3=1x^{2/3}+y^{2/3}=1x2/3+y2/3=1 within the region {(x,y)∣x≥0 and y≥0}\{(x,y)\mid x\ge 0 \text{ and } y\ge 0\}{(x,y)∣x≥0 and y≥0}. 解答
