Understanding the Step of Integrating $\int u*v'$

In summary, the step of integrating $\int u*v'$ involves finding the antiderivative of the product of two functions, and it is important because it allows us to solve various problems in mathematics and science. Some common techniques for integrating $\int u*v'$ include integration by parts, substitution, partial fractions, and trigonometric substitution. To successfully integrate $\int u*v'$, it is important to choose the correct substitution or integration technique, apply the chain rule and product rule carefully, and simplify the resulting expression. Common mistakes to avoid when integrating $\int u*v'$ include misapplying the chain rule or product rule, forgetting to add the constant of integration, and making arithmetic errors during simplification.
  • #1
N468989
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Homework Statement



[tex]\int4x^-3*ln(9x)[/tex]

Homework Equations



[tex]\int u'*v = u*v - \int u*v'[/tex]

The Attempt at a Solution



i know the answer is [tex]\frac{-2ln(9x)-1}{x^2}[/tex]

but i don't understand the step [tex]\int u*v'[/tex]

if any could help me...thanks
 
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  • #2
what don't you understand

u means u
[tex]v'[/tex] means [tex]dv[/tex]
 
  • #3
Solved

thks i understand now
 

FAQ: Understanding the Step of Integrating $\int u*v'$

What is the step of integrating $\int u*v'$?

The step of integrating $\int u*v'$ refers to using the integration process to find the antiderivative of the product of two functions, $u$ and $v'$.

Why is the step of integrating $\int u*v'$ important?

The step of integrating $\int u*v'$ is important because it allows us to solve a wide range of problems in mathematics and science, including finding areas under curves, calculating work done, and determining the growth rates of quantities.

What are some common techniques for integrating $\int u*v'$?

Some common techniques for integrating $\int u*v'$ include integration by parts, substitution, partial fractions, and trigonometric substitution.

What are some tips for successfully integrating $\int u*v'$?

Some tips for successfully integrating $\int u*v'$ include identifying the correct substitution or integration technique to use, carefully applying the chain rule and product rule, and simplifying the resulting expression as much as possible.

Are there any common mistakes to avoid when integrating $\int u*v'$?

Yes, some common mistakes to avoid when integrating $\int u*v'$ include misapplying the chain rule or product rule, forgetting to add the constant of integration, and making arithmetic errors while simplifying the resulting expression.

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