Integration By Parts Formula Derivation  Summary and Q&A
TL;DR
The integration by parts formula is derived by reversing the product rule, and it states that the integral of U times DV equals U times V minus the integral of V times DU.
Questions & Answers
Q: What is the integration by parts formula?
The integration by parts formula states that the integral of U times DV is equal to U times V minus the integral of V times DU. It is used to integrate products of functions.
Q: How is the integration by parts formula derived?
The integration by parts formula is derived by reversing the product rule for differentiation. The derivative terms are replaced with integration symbols, and the equation is rearranged to solve for the desired expression.
Q: What are the variables U and V in the integration by parts formula?
The introduction of the variables U and V in the integration by parts formula allows for an easier representation. U represents one of the functions being integrated, while V represents the other function.
Q: How is the integration by parts formula useful in integration?
The integration by parts formula allows for the integration of products of functions that cannot be integrated using other techniques. It helps simplify the integration process by breaking down complex integrals.
Summary & Key Takeaways

The integration by parts formula is derived from the product rule by taking the derivative of two functions multiplied to each other.

The derivative terms are then replaced with integration symbols, and the equation is rearranged to solve for the desired expression.

Introducing the variables U and V allows for an easier representation of the formula, where the integral of U times DV equals U times V minus the integral of V times DU.