Math question, help please?

Integration of d(cabin)/cabin = log cabin.

To answer your question, it looks like it has something to do with the -x inside the log.

Remember the chain rule: when you have a function within a function, you must multiply by the derivative of the inside function and then integrate the outside function. Your inside function is 1-x, the derivative of which is….?

Oh how I wish I could remember my A level maths lessons =[

@Mariah nailed it.

@Mariah thanx a lot, that helped :D