高等数学基础高等数学随机推荐教材习题蒲和平非数习题解答常微分方程习题 7.2高阶微分方程不看本题本题讨论已掌握查看解析收入错题#15740若 u=f(xyz),f(0)=0,f′(1)=1u = f\left( {xyz}\right) ,f\left( 0\right) = 0,{f}^{\prime }\left( 1\right) = 1u=f(xyz),f(0)=0,f′(1)=1 ,且 ∂3u∂x∂y∂z=x2y2z2f′′′(xyz)\frac{{\partial }^{3}u}{\partial x\partial y\partial z} = {x}^{2}{y}^{2}{z}^{2}{f}^{\prime \prime \prime }\left( {xyz}\right)∂x∂y∂z∂3u=x2y2z2f′′′(xyz) ,求 uuu .