Formally stated, the derivative of a function of the form $latex \displaystyle f = k \cdot u^a \cdot v^b \cdots &s=2$ with k a constant and with respect to an independent variable x, is simply, $latex \displaystyle \frac{\mathrm{d}f}{\mathrm{d}x} = f \cdot \left [ a \frac{\dot{u}}{u} + b \frac{\dot{v}}{v} + \cdots \right ] &s=2$ I find […]
