Z=x*sin xy+e^x+y或设y=(x)是由方程xy+sin x+sin y=1确定,求y”

Z=x*sin xy+e^x+y或设y=(x)是由方程xy+sin x+sin y=1确定,求y” 设Z=sin(x+y)e的f（xy)次方,求əz/əx,əz/əy 设z=f(x^2-y^2,e^（xy)),求偏导z/x,偏导z/y 设z=(x+2y)e^xy,求dz 设z=sin(xy^2)求∂^2z/∂x∂y 设函数z=z(x,y)由方程e^(-xy)-2z+e^z=0确定,求z/x,z/y 求全微分z=e^[sin(x+y)]*y^x sin(x+y)+e^xy=4x,y'= 设隐函数y=y(x)由方程x^y-e^y=sin(xy)所确定,求dy 设方程x+2y+z=e^(x-y-z),确定隐函数z=z(x,y),求对xy的二级偏导. 设f(x+y,x-y)=xy,z=(xy,x/y),则dz= 设y=y(x)由方程e^xy+sin(xy)=y确定,求dy/dx. 设函数z=z(x,y)由方程xy=e^z-z所确定的隐函数 设z=z(x,y)是由方程e^(-xy)+2z-e^z=2确定 求dz|(x=2,y=-1/2) 设z=z(x,y)是由方程e^(-xy)+2z-e^z=2确定 求dz|(x=2,y=-1/2) sin(xy)=x+e^y.y'=? Sin(xy)=x+e^y求y'= sin（x+y）+e^xy=4 求y'