Differentiating with respect to

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Discussion Overview

The discussion revolves around the differentiation of the function z/(2x + y) with respect to x, exploring the implications of treating z and y as constants or as functions of x. The scope includes mathematical reasoning and technical explanation of differentiation techniques.

Discussion Character

  • Technical explanation, Mathematical reasoning

Main Points Raised

  • One participant asks about the differentiation of the function z/(2x + y) with respect to x and proposes an answer.
  • Another participant confirms the proposed answer, stating that z and y are constant with respect to x.
  • A third participant clarifies that if z and y are constant with respect to x, then the initial answer is indeed correct, referring to it as the partial derivative.
  • A fourth participant introduces a different scenario, suggesting that if z and y are not constant with respect to x, the chain rule would need to be applied for differentiation.

Areas of Agreement / Disagreement

There is agreement on the correctness of the differentiation when z and y are treated as constants. However, there is a disagreement regarding the scenario where z and y are functions of x, leading to different approaches in differentiation.

Contextual Notes

The discussion does not resolve the implications of treating z and y as functions of x, leaving the application of the chain rule and its effects on the differentiation process open to interpretation.

cabellos
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differentiating with respect to...

I have a question on differentiating the function z/(2x + y) with respect to x.

Is the answer -2z/(2x + y)^2 ?

Thanks:smile:
 
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yes absolutely right... z and y are constant with respect to x
 
The other way arround actually, if z and y are constant wrt x, then your answer (the partial derivative of the function wrt x) is right :smile:
 
If z and y are NOT "constant with respect to x", but are functions of x, then you would use the chain rule.
 

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