u=ln(xy+z)求du=

u=ln(xy+z)求du= 帮帮忙拜托啦u=ln(x^y乘y^z乘z^y)求du 求函数u=ln(2x+3y+4z^2)的全微分du 设u=ln√(x^2+y^2+z^2) 求du 设u=xsin2y+y^2z+e^(xy),求du打错题目……设u=xsin2y+y^2z+e^(yz),求du u=xy^2+arctan(xy) 求du 设z=uv,u=e^(x+y),v=ln(xy)求dy 设z=ln(eu+v),v=xy,u=x2-y2,求dz/dx,dz/dy. 设u=f(x,y,z)有连续偏导数,y=y(x)和z=z(x)分别由方程e^xy-y=0和e^z-xz=0所确定求du/dx,求详解,答案是du/dx=f'x+y2/1-xy*f'y+z/xz-x*f'z 求z=ln(xx-xy)的定义域. 求z={ln(xy)}^0.5的偏导数, 求 z=根号下ln(xy) 的偏函数 求z=根号ln（xy）的偏导 z=ln(xy+z),求Z对x求微分怎么求 设u=cosh(xy)+cos(xy),则du= 设u=f(x,y,z)有连续偏导数,y=y(x)和z=z(x)分别由方程e^xy-y=0和e^z-xz=0所确定,求du/dx u=f(x,y,z),y=y(x),z=z(x)分别由e^xy-y=0和e^z-xz=0确定,求du/dx 函数u(x,y,z)=4xy^3+5x^2y^6+xz的全微分du