What does dy/du mean?
I understand that $dy/dx$ is the rate of change, and that it means "the
rate of change of $y$ with respect to $x$", but when I see people use
$dy/du$ I get confused ($u$ of course being any variable). What is ment by
using $du$ or anything else but $dx$ in $dy/du$? When I look at a graph I
can only see a $y$ and $x$ axis.
Here is an example of $dy/du$: http://www.youtube.com/watch?v=XIWegI-GPoc
I'm new to calculus and I'm trying to understand the chain rule.
No comments:
Post a Comment