阿摩線上測驗
5. Evaluate the double integral
dA= ______， where R = {(x,y)|0 ≤ x ≤ 2, x² ≤ y ≤ 4}.
dA= ______， where R = {(x,y)|0 ≤ x ≤ 2, x² ≤ y ≤ 4}.