• 2022-06-05
    设\(z = u{e^v}\),\(u = {x^2} + {y^2}\),\(v = xy\),则\( { { \partial z} \over {\partial x}}=\)
    A: \({e^{xy}}({x^2}y + {y^3} + 2x)\)
    B: \({e^{xy}}({x}y^2 + {y^3} + 2x)\)
    C: \({e^{xy}}({x}y + {y^3} + 2x)\)
    D: \({e^{xy}}({x^2}y + {y^2} + 2x)\)