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6.3 Integration By Parts Start with the product rule:

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1 6.3 Integration By Parts Start with the product rule:
This is the Integration by Parts formula.

2 u differentiates to zero (usually).
dv is easy to integrate. u differentiates to zero (usually). The Integration by Parts formula is a “product rule” for integration. Choose u in this order: LIPET Logs, Inverse trig, Polynomial, Exponential, Trig

3 Example 1: LIPET polynomial factor

4 Example: LIPET logarithmic factor

5 Example 4: LIPET This is still a product, so we need to use integration by parts again.

6 Example 5: LIPET This is the expression we started with!

7 Example 6: LIPET

8 Example 6: This is called “solving for the unknown integral.” It works when both factors integrate and differentiate forever.

9 A Shortcut: Tabular Integration
Tabular integration works for integrals of the form: where: Differentiates to zero in several steps. Integrates repeatedly.

10 Compare this with the same problem done the other way:

11 Example 5: LIPET This is easier and quicker to do with tabular integration!

12 p


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