Substitution rule for vectorial functions

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SUMMARY

The discussion centers on the application of the substitution rule, also known as the Change of Variables Theorem, to vectorial functions. A specific example is provided, where the integrand is a vector function composed of three components: \(2(x-1)^2\vec{i}\), \(cos(x)sin(x)\vec{j}\), and \((2x+3)^2\vec{k}\). The solution involves treating each component separately by defining new variables for each, such as \(u = x-1\), \(v = sin(x)\), and \(w = 2x+3\). This approach confirms that the substitution rule is applicable to vectorial functions in a similar manner as it is for scalar functions.

PREREQUISITES
  • Understanding of vector calculus
  • Familiarity with the substitution rule in integration
  • Knowledge of real-valued functions
  • Basic proficiency in handling integrals involving vector functions
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  • Study the Change of Variables Theorem in vector calculus
  • Explore integration techniques for vector functions
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Students and professionals in mathematics, physics, and engineering who are working with vector calculus and integration techniques. This discussion is particularly beneficial for those looking to deepen their understanding of the substitution rule as it applies to vectorial functions.

Castilla
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You remember the substitution rule (or Change of variables theorem), when the integrand is some real function of real variable.

I would like to know if that rule has a version when the integrand is some vectorial function (of real variable).

Thanks for your attention.
 
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Do you mean something like
[tex]\int (2(x-1)^2\vec{i}+ cos(x)sin(x)\vec{j}+ (2x+3)^2\vec{k})dx[/tex]
You could look at each component separately: In the first component, let u= x-1, in the second, v= sin(x), in the third, w= 2x+3.
 
Thanks, HallsofIvy. It worked.
 

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