How to Use the DI Method for Integration by Parts

TL;DR

The DI method simplifies integration by parts by dividing the integral into two parts: one to differentiate and one to integrate. You stop when the function part in a row repeats, allowing you to easily construct the answer using the product of the diagonals and the associated signs.

Transcript

I'm going to show you guys the easiest way to do  integration by parts so check this out this is the   D I method so here's my first example we have the  integral X to a second power times sine of 3x we   all unfortunately use substitution wouldn't work  because if we let u equals two inside function   3x the derivative dies just as three we cannot... Read More

Key Insights

• 🥳 The DI method involves breaking down the integral into two parts: one to differentiate and one to integrate.
• 🫤 The product of the diagonals along with the sign on the side gives the first part of the answer.
• 👻 The DI method allows for easier integration of complex functions.
• ❓ It is important to choose the part to integrate and differentiate wisely for a smoother integration process.
• ❓ The DI method can be used for integrals involving trigonometric, exponential, and logarithmic functions.
• 🥳 Repeating function parts in the DI table indicate when to stop the integration process.
• 🫤 The answer to the integral is obtained by multiplying the product of the diagonals.
• 🙃 Adding the integral on both sides of the equation cancels out the extra terms.

Summary & Key Takeaways

• The DI method involves breaking down the original integral into two parts: one to differentiate and one to integrate.

• The product of the diagonals along with the sign on the side gives the first part of the answer.

• When a row in the table repeats the function part, the integration stops, and the answer can be constructed.