F(x,y,z)=xy+e^xz-zlny -1.
Fx=y+ze^xz Fy=x-z/y Fz=xe^xz-lny
z对x的偏导:-Fx/Fz= - (y+ze^xz)/(xe^xz-lny)
z对y的偏导:-Fy/Fz= - (x-z/y)/(xe^xz-lny)
F(x,y,z)=xy+e^xz-zlny -1.
Fx=y+ze^xz Fy=x-z/y Fz=xe^xz-lny
z对x的偏导:-Fx/Fz= - (y+ze^xz)/(xe^xz-lny)
z对y的偏导:-Fy/Fz= - (x-z/y)/(xe^xz-lny)