Using another properties of chain rule for derivative, suppose y = f ( u ) {\displaystyle y=f(u)} and u = g ( x ) {\displaystyle u=g(x)} , then : d y d x = d y d u ⋅ d u d x . {\displaystyle {\frac {dy}{dx}}={\frac {dy}{du}}\cdot {\frac {du}{dx}}.}
