Integrating a Function with a Variable and Function Multiplied Together

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In summary, integrating a function with f(x^2) involves finding the area under the curve of the function and can be applied to any function as long as it follows the rules of integration. The process is similar to regular integration but involves a substitution of variables. It has many real-world applications, but it can only be used for functions with a single variable and some functions may not have a closed-form solution.
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wvcaudill2
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Homework Statement


http://img857.imageshack.us/i/no34.jpg/


Homework Equations


The Fundamental Theorem of Calculus, i.e., taking the derivative of an integral yields the original function.

The Attempt at a Solution


I am not sure how to go about integrating this function because I have never had an integral that has both a variable and a function being multiplied together.
 
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  • #2
Try a u-substitution. u=x^2 should work.
 
  • #3
Char. Limit said:
Try a u-substitution. u=x^2 should work.

Wow, I can't believe I didnt try u-sub first!

My final answer came to be
[tex] \frac{f(b^{2})-f(a^{2})}{2} [/tex]

Thanks!
 

1. What is the purpose of integrating a function with f(x^2)?

The purpose of integrating a function with f(x^2) is to find the area under the curve of the function. This is useful in many scientific and mathematical applications, such as calculating probabilities, determining displacement, and evaluating physical quantities.

2. How is the process of integrating a function with f(x^2) different from regular integration?

The process of integrating a function with f(x^2) follows the same rules as regular integration, but it involves a substitution of variables. In this case, the variable x is replaced with x^2, which then allows us to solve the integral using standard integration techniques.

3. Can any function be integrated with f(x^2)?

Yes, any function can be integrated with f(x^2) as long as it follows the rules of integration. However, some functions may require more complex techniques or may not have a closed-form solution.

4. What are some real-world applications of integrating a function with f(x^2)?

Integrating a function with f(x^2) has many real-world applications, such as calculating the area under a velocity-time graph to determine the displacement of an object, finding the probability of an event in statistics, and evaluating the work done by a variable force in physics.

5. Are there any limitations to integrating a function with f(x^2)?

One limitation of integrating a function with f(x^2) is that it can only be applied to functions with a single variable. This means that functions with multiple variables, such as f(x,y), cannot be integrated using this method. Additionally, some functions may not have a closed-form solution and may require more advanced integration techniques.

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