全微分精通者帮忙!设z=z(x,y)由方程e的z次方-xy的2次方+sin(y+z)=0确定,求dz

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全微分精通者帮忙!设z=z(x,y)由方程e的z次方-xy的2次方+sin(y+z)=0确定,求dz
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全微分精通者帮忙!设z=z(x,y)由方程e的z次方-xy的2次方+sin(y+z)=0确定,求dz
全微分精通者帮忙!设z=z(x,y)由方程e的z次方-xy的2次方+sin(y+z)=0确定,求dz

全微分精通者帮忙!设z=z(x,y)由方程e的z次方-xy的2次方+sin(y+z)=0确定,求dz
(y^2+2xy-cos(y+z))/(e^z+cos(y+z))

方程e的z次方-xy的2次方+sin(y+z)=0
e^z-xy^2+sin(y+z)=0
设F=e^z-xy^2+sin(y+z)
F分别对x、y、z求导
Fx^'=-y^2
Fy^'=-2xy+cos(y+z)
Fz^'=e^z+cos(y+z)
Z对x的偏导数为  -Fx^'/Fz^'=y^2/[e^z+cos(y+z)]
Z对...

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方程e的z次方-xy的2次方+sin(y+z)=0
e^z-xy^2+sin(y+z)=0
设F=e^z-xy^2+sin(y+z)
F分别对x、y、z求导
Fx^'=-y^2
Fy^'=-2xy+cos(y+z)
Fz^'=e^z+cos(y+z)
Z对x的偏导数为  -Fx^'/Fz^'=y^2/[e^z+cos(y+z)]
Z对y的偏导数为  -Fy^'/Fz^'=-[-2xy+cos(y+z)]/[e^z+cos(y+z)]=[2xy-cos(y+z)]/[e^z+cos(y+z)]
dz=-Fx^'/Fz^'dx+-Fy^'/Fz^'dy
=y^2/[e^z+cos(y+z)]dx+[2xy-cos(y+z)]/[e^z+cos(y+z)]dy

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