Understanding the Derivative of 3ln5x: Solving a Common Integration Dilemma

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SUMMARY

The discussion centers on the differentiation of the function 3ln(5x). The correct derivative is established as 3/x, which is derived using the chain rule or logarithmic properties. Participants clarify that the factor of 5 in the logarithm does not affect the differentiation process, as it is a constant multiplier. The confusion arises from the integration process, where the relationship between the integral of 3/x and the original function is examined.

PREREQUISITES
  • Understanding of basic calculus concepts, specifically differentiation and integration.
  • Familiarity with the chain rule in calculus.
  • Knowledge of logarithmic properties, particularly how to differentiate logarithmic functions.
  • Ability to manipulate algebraic expressions involving logarithms.
NEXT STEPS
  • Study the chain rule in calculus to understand its application in differentiation.
  • Review properties of logarithms to clarify their role in differentiation.
  • Practice problems involving the differentiation of logarithmic functions.
  • Explore integration techniques related to logarithmic functions and their derivatives.
USEFUL FOR

Students studying calculus, particularly those focusing on differentiation and integration of logarithmic functions, as well as educators seeking to clarify common misconceptions in these topics.

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Homework Statement



I think it was: 3ln5x


Homework Equations





The Attempt at a Solution



I just took it on a test. My professor said it was 3/x but I don't see how you get that?

When you get the integral of 3/x how do you get the 3ln5x? Where does the 5 go? I don't understand :(
 
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It is 3/x if you mean to differentiate 3*ln(5*x). There are a couple of different ways to do this. i) use the chain rule, or ii) use the properties of logs before you differentiate.
 

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