74. 設 $f(x, y) = x^{2}y^{3} + e^{x + y}$,試求 $\frac{\partial f}{\partial y}(x, y) = ?$
(A)$2xy^{3} + e^{x + y}$
(B)$3x^{2}y^{2} + e^{x + y}$
(C)$6x^{2}y^{3} + e^{x + y}$
(D)$3x^{2}y^{2} + (x + y)e^{x + y}$

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統計: A(0), B(0), C(0), D(1), E(0) #3927283

詳解 (共 1 筆)

#7487248
解: 題目給: f(x,y) = x²...
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