How Do You Find the Derivative of log(x^2+y^3)?

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Discussion Overview

The discussion revolves around finding the derivative of the function log(x^2 + y^3), particularly focusing on the challenges posed by the presence of variables raised to powers and the involvement of multiple variables. The scope includes calculus concepts related to derivatives, specifically the chain rule and partial derivatives.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant asks for help with the derivative of log(x^2 + y^3), expressing familiarity with log x but uncertainty about the involvement of powers and additional variables.
  • Another participant inquires about the general rule for derivatives of composite functions in the form f(g(x)).
  • Several participants express frustration with the original poster's lack of effort, suggesting that the derivative of composite functions is a fundamental topic covered in calculus resources.
  • A participant mentions the chain rule as a relevant method for finding the derivative.
  • One participant suggests that if x and y are independent variables, the original poster should consider using partial derivatives.
  • A later reply implies that the original poster may have resolved the problem independently due to the time elapsed since the initial post.

Areas of Agreement / Disagreement

Participants express varying levels of frustration regarding the original poster's request for help, with some emphasizing the importance of self-study and others providing technical insights. There is no consensus on how to approach the derivative, as different methods (chain rule vs. partial derivatives) are suggested without agreement on a single approach.

Contextual Notes

The discussion reflects a range of assumptions about the independence of variables and the application of calculus rules, but these assumptions are not universally agreed upon. The conversation also highlights a potential lack of foundational knowledge on the part of the original poster.

engstudent363
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Derivative of log(x^2+y^3) ?

I'm familiar with the derivative of log x but not when x is raised to a power or when y is involved. Could someone offer some help? And if you know of a website that fully explains this please let me know. Thanks.
 
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What is the general rule for taking a derivative of something in the form f(g(x)) ?
 
I don't know, and I never will unless you tell me.
 
engstudent363 said:
I don't know, and I never will unless you tell me.

Do you have a calculus book? Have you ever used it? The derivative of a function of the form f(g(x)) is a very important topic and will certainly be covered in a calculus book, you shouldn't expect people to do your work for you.
 
engstudent363 said:
I don't know, and I never will unless you tell me.
Guess you'll never learn a damn thing.
 


chain rule my friend. chain rule
 


engstudent363 said:
I'm familiar with the derivative of log x but not when x is raised to a power or when y is involved. Could someone offer some help? And if you know of a website that fully explains this please let me know. Thanks.

if x and y are both independent variable then you have to go for partial derivative.
 


thenabforlife and amaresh92: I strongly suspect that the original poster has been able to solve this problem somewhere along the line during the 34 months that have transpired since posting the problem. If not, the OP has bigger problems than the kind of help you two are offering.

Because sleeping threads should be left alone, I am locking this thread.
 

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