# Math Help - dx of ln(x) where is a rational function

1. ## dx of ln(x) where is a rational function

I don't understand what is going on in the second to last line of this. I'm doing something wrong when I get there.

I think it's really just an algebra mistake but I can't seem to see it.

2. ## Re: dx of ln(x) where is a rational function

What is it that you get? Without seeing your work, I can't say where you are going wrong.

3. ## Re: dx of ln(x) where is a rational function

There's a lot of chain rules to bear in mind. Just try to keep track of them all, making sure that you cancel and simplify at each stage. It should make sense after that.

If not, just write the first stage down and try to do it all yourself.

In doing what particularly are you struggling?

Michael