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Question Number 177859 by neinhaltsieger369 last updated on 10/Oct/22

Answered by a.lgnaoui last updated on 10/Oct/22

$$anserix\left(c\right)\frac{3}{7}$$$$\partial W=\frac{\partial W}{\partial x}\partial x+\frac{\partial W}{\partial y}\partial y+\frac{\partial W}{\partial z}$$$$=\frac{1}{{\left(\sqrt{x^2+y^2+z^2}\right)}^2}(x+y+z)=\frac{x+y+z}{x^2+y^2+z^2}$$$$\partial W_{(1,2,3)}=\frac{6}{14}=\frac{3}{7}$$

Commented by neinhaltsieger369 last updated on 10/Oct/22

$$\mathbf{Gracias}$$

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