Can Integration by Parts Solve This Tricky Question?

MHB
Thread starter jaychay
Start date Oct 25, 2020
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Integration Method

In summary, the integration by parts method is a calculus technique used to evaluate integrals of products of functions. It is typically used when the integral involves a difficult-to-integrate product of two functions. To apply this method, one must identify the "u" and "dv" functions, use the product rule, and solve the resulting equation for the integral. The benefits of using this method include being able to integrate a wide range of functions and breaking down complex integrals into simpler ones. Some common mistakes include choosing incorrect functions, not simplifying the integral, and forgetting the integration constant. It is important to carefully follow the steps to avoid errors.

Oct 25, 2020

jaychay

Can you help me with this question ?
I am really struck with this question.
Thank you in advance.

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Oct 25, 2020

skeeter

Using integration by parts, I would let

$u = x^3$ and $dv=x^2\sqrt{x^3+1}$Alternatively, one could use the same setup for the method of substitution letting $t= x^3+1$

1. What is the integration by parts method?

The integration by parts method is a technique used in calculus to find the integral of a product of two functions. It involves breaking down the original integral into two parts and using the product rule to simplify the integration process.

2. When should I use the integration by parts method?

The integration by parts method is typically used when the integral involves a product of two functions, and the usual integration techniques such as substitution or u-substitution are not applicable.

3. How do I choose which function to differentiate and which to integrate in integration by parts?

When using the integration by parts method, it is important to choose the function to differentiate based on the acronym "LIATE" which stands for Logarithmic, Inverse trigonometric, Algebraic, Trigonometric, and Exponential. The function that comes first in this list should be chosen to differentiate.

4. What is the formula for integration by parts?

The formula for integration by parts is ∫u dv = uv - ∫v du, where u and v are the chosen functions to differentiate and integrate, respectively.

5. Are there any limitations to using integration by parts?

Yes, there are limitations to using integration by parts. It may not work for all integrals, and in some cases, it may require multiple iterations of the method to obtain the final result. Additionally, it may not work for integrals with complicated or undefined functions.