>> Well, one formula says something like dy/dx = dy/du * du/dx
> 
> Yes, but note the use of 'u', which in this case basically represents 
> the inner function.

This is one of the more confusing aspects of calculus. The duality 
between "functions" and "variables that share a relationship". That and 
the multiple notations for the same concept...

I still don't entirely understand what you're saying, but presumably 
you're right.

Post a reply to this message