- #1

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I would think because of this

The following problem:

At this stage they should use integration by parts:

However, maybe integration by parts is only useful when one of the parts is e^x ln or a trigonometric formula.

The following problem:

At this stage they should use integration by parts:

However, maybe integration by parts is only useful when one of the parts is e^x ln or a trigonometric formula.

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