Understanding Partial Derivatives of x^2 + y^2 < 1

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Homework Help Overview

The discussion revolves around finding the partial derivatives of the function defined by the inequality x^2 + y^2 < 1. Participants are exploring the nature of the derivatives and addressing a misunderstanding related to the expressions for these derivatives.

Discussion Character

  • Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to compute the partial derivatives but questions the validity of a specific expression provided by another participant. There are discussions about the nature of the problem and the appropriate section for posting such questions.

Discussion Status

Some participants have acknowledged a misunderstanding regarding the placement of the question in the forum. The original poster has indicated that the issue has been resolved, but there remains a discussion about the appropriateness of the section for the topic.

Contextual Notes

There is mention of an error in reading the problem statement, which led to confusion about the derivatives. The original poster expressed a desire to delete the question after realizing the mistake, highlighting the forum's policy on handling answered questions.

emergentecon
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Homework Statement



x^2 + y^2 < 1

Find the partial derivatives of the function.

Homework Equations



x^2 + y^2 < 1

The Attempt at a Solution



@f/@x = 2x = 0
@f/@y = 2y = 0

4. Their solution

@f/@x = 2x = 0
@f/@y = 2y + 1 = 0

5. My Problem


I don't see how / why they get 2y + 1 for the partial of y?
 
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Issue is resolved, there was an error in reading the text.
I cannot see how to delete the question though?
 
Questions about differentiation should be posted in the Calculus & Beyond section.

Just because a question has been answered it is not ordinarily deleted.
 
1. Given the elementary nature of the question, why is Calculus & Beyond Homework not the correct section?
2. It is not a function of deleting an answered question. I misunderstood something I was reading, and thereby posted an erroneous question.
 
emergentecon said:
1. Given the elementary nature of the question, why is Calculus & Beyond Homework not the correct section?
It IS the correct section. You initially posted it in the Precalculus section. I moved it.
emergentecon said:
2. It is not a function of deleting an answered question. I misunderstood something I was reading, and thereby posted an erroneous question.
You can post the corrected question here in this thread.
 
Ok . . . mea culpa for the section error.
 
Mark44 said:
It IS the correct section. You initially posted it in the Precalculus section. I moved it.

You can post the corrected question here in this thread.
Once I realized my error, I no longer had a problem with the question.
Hence wanting to delete it. But I see how it works, thank you.
 

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