设z=f(x,y),由F(x,y,z)=0确定,且FX(x,y,z)=a,Fy(x,y,z)=b ,Fz(x,y,z)=c,求fx的偏导
问题描述:
设z=f(x,y),由F(x,y,z)=0确定,且FX(x,y,z)=a,Fy(x,y,z)=b ,Fz(x,y,z)=c,求fx的偏导
答
∂z/∂x=-Fx/Fz=-a/c
设z=f(x,y),由F(x,y,z)=0确定,且FX(x,y,z)=a,Fy(x,y,z)=b ,Fz(x,y,z)=c,求fx的偏导
∂z/∂x=-Fx/Fz=-a/c