Why is 2/(x lnx^2) = 1 / (x ln x) ?

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SUMMARY

The equation 2/(x ln x^2) simplifies to 1/(x ln x) through the application of logarithmic properties. Specifically, ln(x^2) can be rewritten as 2 ln(x), allowing for the cancellation of terms in the equation. This simplification is a fundamental concept in logarithmic manipulation, which is essential for understanding calculus-level problems. The discussion highlights the importance of mastering logarithmic identities for students transitioning from precalculus to calculus.

PREREQUISITES
  • Understanding of logarithmic properties, specifically ln(a^b) = b ln(a)
  • Basic algebra skills for manipulating fractions and equations
  • Familiarity with calculus concepts, particularly limits and derivatives
  • Knowledge of precalculus topics, including functions and their transformations
NEXT STEPS
  • Study the properties of logarithms, focusing on simplification techniques
  • Practice problems involving logarithmic equations and their applications in calculus
  • Learn about the transition from precalculus to calculus, emphasizing foundational concepts
  • Explore additional resources on algebraic manipulation and its relevance in higher mathematics
USEFUL FOR

This discussion is beneficial for students transitioning from precalculus to calculus, educators teaching logarithmic concepts, and anyone seeking to strengthen their understanding of mathematical simplification techniques.

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Homework Statement


2/(x lnx^2) = 1 / (x ln x)
That is the answer in the back of my textbook. I have reached 2 ( x ln x^2) , but I do not know why it is = to 1 / ( x ln x )

Homework Equations





The Attempt at a Solution


I tried to look into precal book to see if I could find information on this "ln simplify process" but I can't find it. I didn't have proper math classes so I am missing a lot of math stuff that people who take calculus should know :/ Please advice. Thank you.
 
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Knight226 said:

Homework Statement


2/(x lnx^2) = 1 / (x ln x)
That is the answer in the back of my textbook. I have reached 2 ( x ln x^2) , but I do not know why it is = to 1 / ( x ln x )

Homework Equations





The Attempt at a Solution


I tried to look into precal book to see if I could find information on this "ln simplify process" but I can't find it. I didn't have proper math classes so I am missing a lot of math stuff that people who take calculus should know :/ Please advice. Thank you.

Can you simplify ln(x2)? Look in your book for properties of logarithms. They should be close to the beginning of the section that introduces logs.

Also, this section of the forum is for Calculus & Beyond. Yours is a precalculus question.
 

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