Integration using u substitution

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SUMMARY

The forum discussion focuses on evaluating the integral of the function (x+1)5^(x+1)^2 using u-substitution. The initial substitution made was u = (x+1), leading to du = dx, which transformed the integral into u * 5^(u^2). A suggestion was made to apply a second substitution, w = u^2, to facilitate the integration process. Additionally, participants emphasized the importance of reviewing integration formulas for the exponential function, specifically the integral of a^x.

PREREQUISITES
  • Understanding of u-substitution in integral calculus
  • Familiarity with exponential functions and their integrals
  • Knowledge of basic integration techniques
  • Ability to manipulate algebraic expressions
NEXT STEPS
  • Review integration formulas for the integral of a^x
  • Practice u-substitution with various functions
  • Explore advanced techniques in integration, such as integration by parts
  • Learn about the implications of multiple substitutions in integral calculus
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Students studying calculus, particularly those focusing on integration techniques, as well as educators looking for examples of u-substitution applications.

thegoosegirl42
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Homework Statement


Evaluate the integral of (x+1)5^(x+1)^2

Homework Equations

The Attempt at a Solution


I set my u=(x+1) making du=1dx. This makes it u*5^u^2. I integrated the first u to be ((x+1)^2/2) however I don't know what to do with the 5^u^2
 
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thegoosegirl42 said:

Homework Statement


Evaluate the integral of (x+1)5^(x+1)^2

Homework Equations

The Attempt at a Solution


I set my u=(x+1) making du=1dx. This makes it u*5^u^2. I integrated the first u to be ((x+1)^2/2) however I don't know what to do with the 5^u^2

You don't do integrals in pieces like that. Assuming that what you have is ##\int u 5^{u^2}~du## try another u type substitution ##w = u^2##. You may need to review your integration formulas for ##\int a^x~dx##.
 

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