设函数z=z(x,y)由方程x²;+2y²;+3z²;=18所确定,则全微分dz=
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![设函数z=z(x,y)由方程x²;+2y²;+3z²;=18所确定,则全微分dz=](/uploads/image/z/5282237-29-7.jpg?t=%E8%AE%BE%E5%87%BD%E6%95%B0z%3Dz%28x%2Cy%29%E7%94%B1%E6%96%B9%E7%A8%8Bx%26%23178%3B%3B%2B2y%26%23178%3B%3B%2B3z%26%23178%3B%3B%3D18%E6%89%80%E7%A1%AE%E5%AE%9A%2C%E5%88%99%E5%85%A8%E5%BE%AE%E5%88%86dz%3D)
设函数z=z(x,y)由方程x²;+2y²;+3z²;=18所确定,则全微分dz=
设函数z=z(x,y)由方程x²;+2y²;+3z²;=18所确定,则全微分dz=
设函数z=z(x,y)由方程x²;+2y²;+3z²;=18所确定,则全微分dz=
我来试试吧...
x²+2y²+3z²=18,两边微分
2xdx+4ydy+6zdz=0
dz=-x/(3z)dx-2y/(3z)dy