Eric Nicholas K's answer to Mevking's Malaysia question.

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Eric Nicholas K
Eric Nicholas K's answer
5997 answers (Tutor Details)
Sorry, I just realised that I had taken the much harder way earlier on and had not realised that it was actually only done this way.

On the left side is my failed attempt (just to illustrate that not all choices of terms work) and on the right side is my new choice of terms for integration by parts.

The working on the right side uses the results from part a as an intermediary working.