- #1

EastWindBreaks

- 128

- 3

## Homework Statement

## Homework Equations

## The Attempt at a Solution

I am trying to repair my rusty calculus. I don't see how du = dx*dt/dt, I know its chain rule, but I got (du/dx)*(dx/dt) instead of dxdt/dt, if I recall correctly, you cannot treat dt or dx as a variable, so they don't cancel out. so for (du/dx)(dx/dt) to become dxdt/dt, du/dx must equal to dt, which is not...