Derivata totale: differenze tra le versioni

:<math>\frac{d}{dt}f(x(t),y(t),z(t),t)= \frac{\partial f}{\partial x}\frac{\partial xdx}{\partial tdt} +\frac{\partial f}{\partial y}\frac{\partial ydy}{\partial tdt} + \frac{\partial f}{\partial z}\frac{\partial zdz}{\partial tdt}+\frac{\partial f}{\partial t}=\frac{\partial f}{\partial x}u(t) +\frac{\partial f}{\partial y}v(t) + \frac{\partial f}{\partial z}w(t)+\frac{\partial f}{\partial t}</math>