(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Hey >.< another simple problem;

find [tex]\frac{\partial u}{\partial y} , \frac{\partial v}{\partial y}, \frac{\partial w}{\partial y}[/tex]

given that

u - v + 2w = x + 2z

2u + v - 2w = 2x - 2z

u - v + w = z - y

3. The attempt at a solution

I don't know, this question is really bugging me, i understand that the whole idea of partial differentiation is only to have to deal with the change of one variable, so why are you given the first two equations? if you assume that everything apart from y & u are constant then of course

[tex]\frac{\partial u}{\partial y} = -1 [/tex]

however this isn't the answer, i thought maybe you can't assume that they're constant, because u is dependant on them, however this becomes an insanely hard/impossible simultaneous equation if you try to solve for all of their changes!

could someone give me a hint? i think i'm missing the point of this question (done all of the other questions in the exercise so far)

and of course, once again thank you for help you give me! =D

p.s answers are 0, 2 & 1

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# Homework Help: Simple Partial Differentiation

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