по формуле: [m](x^{ α })`= α x^{ α-1 }[/m]
[m]=\frac{y}{z}\cdot x^{\frac{y}{z}-1}[/m]
[m]\frac{ ∂ u}{ ∂ y}=(x^{\frac{y}{z}})`_{y}=[/m]
по формуле: [m](a^{ u })`= a^{ u }\cdot lna\cdot u`[/m]
[m]=x^{\frac{y}{z}}\cdot lnx \cdot (\frac{y}{z})`_{y}=x^{\frac{y}{z}}\cdot lnx \cdot\frac{1}{z}[/m]
[m]\frac{ ∂ u}{ ∂ z}=(x^{\frac{y}{z}})`_{z}=[/m]
по формуле: [m](a^{ u })`= a^{ u }\cdot lna\cdot u`[/m]
[m]=x^{\frac{y}{z}}\cdot lnx \cdot (\frac{y}{z})`_{z}=x^{\frac{y}{z}}\cdot lnx \cdot y \cdot (-\frac{1}{z^2})[/m]
[m]du=\frac{ ∂ u}{ ∂ x}dx+\frac{ ∂ u}{ ∂ y}dy+\frac{ ∂ u}{ ∂ z}dz [/m]
[m]du=\frac{y}{z}\cdot x^{\frac{y}{z}-1}dx+x^{\frac{y}{z}}\cdot lnx \cdot\frac{1}{z}dy-x^{\frac{y}{z}} \cdot \frac{y\cdot lnx}{z^2}dz[/m]