Simplifying Integration by Parts: Understanding the Solution

Click For Summary
SUMMARY

The discussion focuses on the integration of the function ∫ln(2x+1) using integration by parts. The initial solution presented was xln(2x+1) + (1/2)ln(2x+1) - x + C, which was later simplified to (1/2)(2x+1)ln(2x+1) - x + C. Participants emphasized the importance of recognizing common factors and utilizing substitution to achieve the simplified form, confirming that both answers are equivalent.

PREREQUISITES
  • Understanding of integration techniques, specifically integration by parts.
  • Familiarity with logarithmic functions and their properties.
  • Knowledge of substitution methods in calculus.
  • Basic algebra skills for simplifying expressions.
NEXT STEPS
  • Practice additional integration by parts problems, focusing on logarithmic functions.
  • Explore the properties of logarithms to enhance simplification skills.
  • Study substitution methods in calculus for more complex integrals.
  • Review algebraic techniques for factoring and simplifying expressions.
USEFUL FOR

Students studying calculus, particularly those learning integration techniques, and educators looking for examples of integration by parts involving logarithmic functions.

Jay9313
Messages
40
Reaction score
0

Homework Statement



∫ln(2x+1) Integrate by parts

Homework Equations



I got xln(2x+1)+\frac{1}2{}ln(2x+1)-x+C

The Attempt at a Solution



The solution is \frac{1}{2}(2x+1)ln(2x+1)-x+C

I know the answers are the same,but it's bugging me that I can't simplify the first answer I got to the second answer. Can someone explain it to me?
 
Physics news on Phys.org
Look at the first two terms of your answer. Is there a common factor there that you can pull out?
 
ln(2x+1) But I don't see how that will help?
 
Oh, you can pull the term out, substitute your x from your u substitution, combine some terms, and you get it! Thanks!
 
Glad I could help :)
 

Similar threads

  • · Replies 6 ·
Replies
6
Views
2K
Replies
7
Views
2K
  • · Replies 105 ·
4
Replies
105
Views
7K
  • · Replies 15 ·
Replies
15
Views
2K
  • · Replies 4 ·
Replies
4
Views
1K
Replies
5
Views
2K
Replies
19
Views
2K
  • · Replies 4 ·
Replies
4
Views
1K
  • · Replies 14 ·
Replies
14
Views
2K
  • · Replies 13 ·
Replies
13
Views
2K