23. 令\(f(x, y) = \sqrt{a^2 - x^2 - y^2}\)及 \( R = \{(x,y) | x^2 + y^2 \le a^2, y \ge 0\} \),則\( \iint_{R} f(x, y) \, dxdy = ? \)

(A)\( \frac{4}{3} \pi a^3 \)
(B) \( \frac{2}{3} \pi a^3 \)
(C)\( \frac{1}{3} \pi a^3 \)
(D) \( \frac{1}{6} \pi a^3 \)

23. 令f(x, y) = √a^2 - x^2 - y^2及 R = \(x,y) | x^2 + y^2 a^2, y 0\,則_R f(x, y) dxdy = ? (A)4/3 π a^3(B)&n

阿摩線上測驗 · 2026-09-08T11:34:12+08:00

23. 令f(x, y) = √a^2 - x^2 - y^2及 R = \(x,y) | x^2 + y^2 a^2, y 0\,則_R f(x, y) dxdy = ? (A)4/3 π a^3(B) 2/3 π a^3(C)1/3 π a^3(D) 1/6 π a^3

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