find dy/dx at x=2 if y=6u^2-11and u=3x^2+2
find dy/dx at x=2 if y=6u^2-11and u=3x^2+2
设二元函数 z=u^2,u=x+y v=x-y ,求dz/dx,dz/dy
设z=u^2cosv^2,u=x+y,v=xy,求dz/dx,dz/dy.
验证(x^2-2xy+y^2)dx-(x^2-2xy-y^2)dy是某个二元函数u=u(x,y)的全微分,并求u=u(x
复合函数的微分y=sin(2x+1),求dy y=sin u,u=2x+1 根据公式,dy=f'(u)g'(x)dx 得
设z=u^2v^2,而u=x-y,v=x+y,求dz/dx,dz/dy
设z=u^2+v^2,且u=x+y,v=x-y,求dz/dx,dz/dy
z=u^v,而u=x+2y,v=x-y,求dz/dx,dz/dy(偏导数)
z=u^v,而u=x+2y,v=x-y,求dz/dx,dz/dy.各种求过程
(x^2)dy+(y^2)dx=dx-dy
dy/dx-y/x=x^2
令u=Y/X,为什么可得出dY/dX=X*du/dX+u?