Integrating x/2: Why is u-substitution not being used?

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SUMMARY

The discussion centers on the integration of the function x/2 and the application of u-substitution in calculus. The participant expresses confusion regarding the lack of u-substitution in the provided solution, despite the textbook utilizing it. The participant correctly identifies that using u = x/2 leads to the same result, but notes that the textbook omits certain steps in the explanation. This highlights the importance of clear communication in mathematical problem-solving.

PREREQUISITES
  • Understanding of basic calculus concepts, specifically integration.
  • Familiarity with u-substitution technique in integration.
  • Knowledge of differential notation, particularly du and dx.
  • Ability to interpret mathematical expressions and transformations.
NEXT STEPS
  • Study the u-substitution method in detail, focusing on its application in integration.
  • Review examples of integration techniques in calculus textbooks, particularly those that explain each step.
  • Practice integrating functions using different substitution methods to reinforce understanding.
  • Explore common pitfalls in calculus problem-solving and how to avoid them.
USEFUL FOR

Students learning calculus, educators teaching integration techniques, and anyone seeking to improve their problem-solving skills in mathematics.

bobsmith76
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I don't understand why the x/2 is not being integrated. I would think one should use u substitution. u = x/2, du = x, but they're not doing that.
 
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Actually the book referred has used this substitution and have finally put u=x/2 again as question is asked in form of x/2 and not in u.
 
Actually, they DID, but they skipped a couple of steps (like explaining HOW they integrated). If you try a u-substitution, you'll get the same answer they did.
 

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