(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

[tex]\int[/tex]ln(7x+9)dx

2. Relevant equations

derivative of ln is 1/x

3. The attempt at a solution

Well im just learning IBP so i set u=7x+9 dv=lndx but im stuck there. How do you know which to make ur u is there a way or is it trial and error

Can i split the integral as:

∫ln(7x)+∫9

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# Integration by parts trial and error

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